" Central Intelligence Agency's clandestine New York station was destroyed in Sept 11 attack on World Trade Center, seriously disrupting US intelligence operations; station was in 7 World Trade Center, one of smaller office towers destroyed in aftermath of collapse of twin towers; all CIA employees at site were safely evacuated; agency immediately dispatched special team to scour rubble in search of secret documents and intelligence reports stored in station"
http://query.nytimes.com/search/abstract?r...DA80994D9404482New York Times, November 29, 2001
THE SITE
Engineers Suspect Diesel Fuel in Collapse of 7 World Trade Center
By JAMES GLANZ
Almost lost in the chaos of the collapse of the World Trade Center is a mystery that under normal circumstances would probably have captured the attention of the city and the world. That mystery is the collapse of a nearby 47-story, two-million-square-foot building seven hours after flaming debris from the towers rained down on it, igniting what became an out-of-control fire.
Engineers and other experts, who quickly came to understand how hurtling airplanes and burning jet fuel had helped bring down the main towers, were for weeks still stunned by what had happened to 7 World Trade Center. That building had housed, among other things, the mayor's emergency command bunker. It tumbled to its knees shortly after 5:20 on the ugly evening of Sept. 11.
The building had suffered mightily from the fire that raged in it, and it had been wounded by the flying beams falling off the towers. But experts said no building like it, a modern, steel-reinforced high-rise, had ever collapsed because of an uncontrolled fire, and engineers have been trying to figure out exactly what happened and whether they should be worried about other buildings like it around the country.
As engineers and scientists struggle to explain the collapse of 7 World Trade Center, they have begun considering whether a type of fuel that was inside the building all along created intensely hot fires like those in the towers: diesel fuel, thousands of gallons of it, intended to run electricity generators in a power failure.
One tank holding 6,000 gallons of fuel was in the building to provide power to the command bunker on the 23rd floor. Another set of four tanks holding as much as 36,000 gallons were just below ground on the building's southwest side for generators that served some of the other tenants.
Engineers and other experts have already uncovered evidence at the collapse site suggesting that some type of fuel played a significant role in the building's demise, but they expect to spend months piecing together the picture of what remains a disturbing puzzle.
"Even though Building 7 didn't get much attention in the media immediately, within the structural engineering community, it's considered to be much more important to understand," said William F. Baker, a partner in charge of structural engineering at the architectural firm Skidmore, Owings & Merrill. "They say, `We know what happened at 1 and 2, but why did 7 come down?' "
Engineers said that here and across the country, diesel-powered generators are used in buildings like hospitals and trading houses, where avoiding power outages is crucial. Partly for that reason, Jonathan Barnett said, a definitive answer to the question of what happened in 7 World Trade Center is perhaps the most important question facing investigators.
"It's just like when you investigate a plane crash," said Dr. Barnett, a professor of fire protection engineering at the Worcester Polytechnic Institute. "If we find a weakness in the building or a deficiency in the building that causes that collapse, we then want to find that weakness in other buildings and fix it."
In many ways, 7 World Trade Center, built and owned by Silverstein Properties, was structurally similar to its towering cousins across Vesey Street to the south. The weight of the building was supported by a relatively tight cluster of steel columns around the center of each floor and a palisade of columns around the outside, in the building's facade.
Sprayed on the steel, almost like imitation snow in holiday decorations, was a layer of fireproofing material, generally less than an inch thick. Although the fireproofing was intended to withstand ordinary fires for at least two hours, experts said buildings the size of 7 World Trade Center that are treated with such coatings have never collapsed in a fire of any duration.
Most of three other buildings in the complex, 4, 5 and 6 World Trade, stood despite suffering damage of all kinds, including fire.
Still, experts concede, in a hellish day, 7 World Trade might have sustained structural injuries never envisioned in fire codes. That day began with flaming pieces of steel and aluminum and, horribly, human bodies raining around the building.
With the collapse of both towers by 10:30 a.m., larger pieces of the twin towers had smashed parts of 7 World Trade and set whole clusters of floors ablaze. An hour later, the Fire Department was forced to abandon its last efforts to save the building as it burned like a giant torch. It fell in the late afternoon, hampering rescue efforts and hurling its beams into the ground like red-hot spears.
Within the building, the diesel tanks were surrounded by fireproofed enclosures. But some experts said that like the jet fuel in the twin towers, the diesel fuel could have played a role in the collapse of 7 World Trade.
"If the enclosures were damaged, then yes, this would be enough fuel to explain why the building collapsed," Dr. Barnett said.
Dr. Barnett and Mr. Baker are part of an assessment team organized by the American Society of Civil Engineers and the Federal Emergency Management Agency to examine the performance of several buildings during the attacks. If further studies of the debris confirm the findings of extremely high temperature, Dr. Barnett said, "the smoking gun would be the fuel."
Others experts agreed that the diesel fuel could have speeded the collapse, but said the building might have met the same fate simply because of how long it burned.
"The fuel absolutely could be a factor," said Silvian Marcus, executive vice president for the Cantor Seinuk Group and a structural engineer involved in the original design of the building, which was completed in 1987. But he added, "The tanks may have accelerated the collapse, but did not cause the collapse."
Because of those doubts, engineers hold open the possibility that the collapse had other explanations, like damage caused by falling debris or another source of heat.
The fuel tanks were not the only highly flammable materials in the building. But while some engineers have speculated that a high-pressure gas main ruptured and caught fire, there was none in the area, said David Davidowitz, vice president of gas engineering at Consolidated Edison. The building was served only by a four-inch, low-pressure line for the building's cafeteria, Mr. Davidowitz said.
The mayor's command bunker, built in 1998, included electrical generators on the seventh floor, where there was a small fuel tank, said Jerome M. Hauer, director of the mayor's Office of Emergency Management from 1996 to 2000. That tank was fed by a tank containing thousands of gallons of diesel fuel on a lower floor, he said.
Francis E. McCarton, a spokesman for the emergency management office, confirmed that assessment. "We did have a diesel tank in the facility," he said. "Yes, it was used for our generating system."
The manager of the building when it collapsed, Walter Weems, said the larger tank sat on a steel-and-concrete pedestal on the second floor and held 6,000 gallons of diesel fuel. He said an even larger cache, four tanks containing a total of 36,000 gallons of diesel fuel, sat just below ground level in the loading dock near the southwest corner of the building.
"I'm sure that with enough heat it would have burned," Mr. Hauer said of the diesel. "The question is whether the collapse caused the tank to rupture, or whether the material hitting the building caused the tank to rupture and enhance the fire."
Falling debris also caused major structural damage to the building, which soon began burning on multiple floors, said Francis X. Gribbon, a spokesman for the Fire Department. By 11:30 a.m., the fire commander in charge of that area, Assistant Chief Frank Fellini, ordered firefighters away from it for safety reasons.
A combination of an uncontrolled fire and the structural damage might have been able to bring the building down, some engineers said.
But that would not explain steel members in the debris pile that appear to have been partly evaporated in extraordinarily high temperatures, Dr. Barnett said."Any structure anywhere in the world, if you put it in these conditions, it will not stand," Mr. Marcus said. "The buildings are not designed to be a torch."
7 World Trade Center:
Secret Service, New York Electronics Crimes Taskforce
Television documentary
http://www.g4tv.com/mediaplayer/videostrea...0402a_165_0.asfhttp://www.g4tv.com/techtvvault/features/2...et_Service.htmlThe Secret Service New York Field Office was located in 7 World Trade Center, which, along with Towers 1 and 2, collapsed following the terrorist attacks. One employee, Master Special Officer Craig Miller, died during the rescue efforts. Miller was temporarily assigned to New York in preparation for the United Nations General Assembly. Following the attacks, Secret Service employees were some of the first to respond with first aid trauma kits. Special agents assisted local fire and police rescue in establishing triage areas and helping evacuate people from the Towers.
http://www.secretservice.gov/press/pub1202.pdfThe resolution honoring the Secret Service notes the “extraordinary performance and commitment to service during and immediately following the terrorist attacks on the World Trade Center on September 11, 2001" of the men and women of that agency. It notes that “the United States Secret Service New York field office located in 7 World Trade Center was destroyed on September 11, 2001, as a result of terrorist attacks”; agents “throughout the day of the attacks and subsequent days...continually and knowingly placed themselves in exceptional danger in their efforts to save life”; and “in selfless dedication to others, Master Special Officer Craig Miller was lost in the collapse of the World Trade Center.”
http://www.house.gov/apps/list/press/ok05_...oms_honors.htmlThe Secret Service maintained a large field office inside the World Trade Centre, and initially many agents were thought to have been killed.
http://www.telegraph.co.uk/news/main.jhtml...6%2Fwbush16.xmlImage:
http://www.arlingtoncemetery.net/craig-miller-photo-01.jpgArlington Cemetary Website: Craig Miller
http://www.arlingtoncemetery.net/craig-miller.htmThe Achilles' heel of the present administration.
http://wtc.nist.gov/pubs/WTC%20Part%20IIC%...pse%20Final.pdfQUOTE
SEISMIC EVIDENCE
The seismic effects of the collapse of the towers were observed and measured by
Columbia University’s Lamont-Doherty Earth Observatory just up the Hudson River in
Palisades, New York. Here seismographs recorded two spikes reflecting two shock waves
in the earth on the morning of 9/11. The crucial fact is that these two spikes came just
before the collapse of the towers began. Specifically, Columbia scientists at the facility
registered a tremor of 2.1 on the Richter scale at 9:59:04 EDT, just before the beginning
of the collapse of the South Tower, and a 2.3 shock just as the North Tower began to
come down at 10:28:31 EDT. Both tremors were recorded before the vast majority of the
mass of the buildings hit the ground. Although they were not of earthquake proportions,
these were considerable shocks, about twenty times more potent than any previously
measured shock wave generated by a falling building. The 1993 WTC truck bomb had
produced no seismic effects at all – it had failed to register. At 5:20 local time on the
afternoon of 9/11, there was also a 0.6 tremor from the collapse of WTC 7, also at the
beginning, rather than the end, of this building’s collapse. Dr. Arthur Lerner-Lam, the
director of the Columbia Center for Hazards and Risk Research, commented that “during
the collapse, most of the energy of the falling debris was absorbed by the towers and
neighboring structures, converting them into rubble and dust or causing other damage –
but not causing significant ground shaking.” But Lerner-Lam declined to draw any
conclusions from the glaring anomaly represented by his data, which the 9/11
commission has also avoided. (Marrs 39 ff.)
After most of the pile was removed, experts found that there were pools of what appeared
to have been molten metal which had congealed on foundations of the buildings many
levels underground. Some steel appeared to have partially melted, other steel had
undergone alternations to its crystalline structure, and still other steel was full of holes,
like a Swiss cheese.
Richard Sheirer is a Senior Vice President at Giuliani Partners and is
New York City’s former Commissioner of Emergency Management.
In February of 2000, he was named Director of the Mayor's Office of
Emergency Management where he was also responsible for the construction
of Bunker wtc 7, supervised by Jerome Hauer...
Emergency Medical Service response on September 11
QUOTE (->
| QUOTE |
SEISMIC EVIDENCE The seismic effects of the collapse of the towers were observed and measured by Columbia University’s Lamont-Doherty Earth Observatory just up the Hudson River in Palisades, New York. Here seismographs recorded two spikes reflecting two shock waves in the earth on the morning of 9/11. The crucial fact is that these two spikes came just before the collapse of the towers began. Specifically, Columbia scientists at the facility registered a tremor of 2.1 on the Richter scale at 9:59:04 EDT, just before the beginning of the collapse of the South Tower, and a 2.3 shock just as the North Tower began to come down at 10:28:31 EDT. Both tremors were recorded before the vast majority of the mass of the buildings hit the ground. Although they were not of earthquake proportions, these were considerable shocks, about twenty times more potent than any previously measured shock wave generated by a falling building. The 1993 WTC truck bomb had produced no seismic effects at all – it had failed to register. At 5:20 local time on the afternoon of 9/11, there was also a 0.6 tremor from the collapse of WTC 7, also at the beginning, rather than the end, of this building’s collapse. Dr. Arthur Lerner-Lam, the director of the Columbia Center for Hazards and Risk Research, commented that “during the collapse, most of the energy of the falling debris was absorbed by the towers and neighboring structures, converting them into rubble and dust or causing other damage – but not causing significant ground shaking.” But Lerner-Lam declined to draw any conclusions from the glaring anomaly represented by his data, which the 9/11 commission has also avoided. (Marrs 39 ff.)
After most of the pile was removed, experts found that there were pools of what appeared to have been molten metal which had congealed on foundations of the buildings many levels underground. Some steel appeared to have partially melted, other steel had undergone alternations to its crystalline structure, and still other steel was full of holes, like a Swiss cheese. |
Richard Sheirer is a Senior Vice President at Giuliani Partners and is
New York City’s former Commissioner of Emergency Management.
In February of 2000, he was named Director of the Mayor's Office of
Emergency Management where he was also responsible for the construction
of Bunker wtc 7, supervised by Jerome Hauer...
Emergency Medical Service response on September 11
Chief of Planning (Car 4P) established a WTC 7 Division at around 9:30 am By ...
of Emergency Management (OEM) offices at WTC 7. ...
http://www.nyc.gov/html/fdny/pdf/mck_report/ems_response.pdfObservations, Findings, and Recommendations
QUOTE
8.2.8 Appendix C: Limited Metallurgical Examination
Two structural steel samples from the WTC site were observed to have unusual erosion patterns. One sample is believed to be from WTC 7 and the other from either WTC 1 or WTC 2.
8.2.8.1 Observations and Findings
a. The thinning of the steel occurred by high temperature corrosion due to a combination of oxidation and sulfidation.
b. Heating of the steel into a hot corrosive environment approaching 1,000 °C (1,800 °F) results in the formation of a eutectic mixture of iron, oxygen, and sulfur that liquefied the steel.
c. The sulfidation attack of steel grain boundaries accelerated the corrosion and erosion of the steel.
d. The high concentration of sulfides in the grain boundaries of the corroded regions of the steel occurred due to copper diffusing from the high-strength low-alloy (HSLA) steel combining with iron and sulfur, making both discrete and continuous sulfides in the steel grain boundaries.
8.2.8.2 Recommendations
The severe corrosion and subsequent erosion of Samples 1 and 2 constitute an unusual event. No clear explanation for the source of the sulfur has been identified. The rate of corrosion is also unknown. It is possible that this was the result of long-term heating in the ground following the collapse of the buildings. It is also possible that the phenomenon started prior to collapse and accelerated the weakening of the steel structure. A detailed study into the mechanisms of this phenomenon is needed to determine what risk, if any, is presented to existing steel structures exposed to severe and long-burning fires.
http://www.house.gov/science/hot/wtc/wtc-report/WTC_ch8.pdf
Schneibster
15th November 2005 - 01:23 AM
QUOTE (Foxx+)
What strikes me the most about this damage is that if such damage was contributory to the collapse, it would certainly lead to asymmetric collapsing.
How do you know? This IS a physics site, after all- perhaps you'd care to share your calculations with us. Oh, yeah, that's right, you think ALGEBRA is "convoluted." Basically, you couldn't figure your way out of a paper bag, and here you are offering your expertise on structural engineering. Well, I think I'll just take that with a grain of salt, thanks.
QUOTE (Foxx+)
Official conspiracy believers also seem to put great weight on the cantilevered nature of the WTC7 design, which I find quite odd because a cantilevered design is far more susceptible to asymmetric collapse than a standard non-cantilevered design.
Which shows precisely how much you know about structural engineering. The cantilevers are the LEAST likely point of failure; and in fact, they didn't fail; their pivot points failed. That's how cantilevers are designed.
QUOTE (Foxx+)
I see the Schneibster is avoiding any comment on the fact that NIST is lying about the forensic evidence of steel recovered from WTC 7.
Ummmm, in case you didn't notice, the evidence is of microstructural changes in the steel. This doesn't happen under the influence of explosives; it happens under the influence of heat possibly combined with pressure.
Then there's the fact that your post quotes a version of the interim report from Jan '03, when the report from June '04 is available and has been for quite some time (a year and four months, perhaps? Silly me). You might try
this one which says, "No structural elements have been positively identified from WTC 7." Obviously, that is within the purview of the team making this report; they're not responsible for you being stupid enough to think that they are aware of every team out there investigating this dog's breakfast, by some sort of osmosis or omniscience or something. If you're that stupid, you probably shouldn't be posting on the Internet.
Schneibster
15th November 2005 - 01:27 AM
QUOTE (Faux+)
I see. And I guess you believe it is scientific to put a ruler on the convex surface of a computer monitor and make qualified and accurate decisions based on what you 'see' there.
Actually, I used a piece of paper as a straightedge. It's a pretty simple procedure; but I'm not surprised it's beyond your l33t sk1ll2.
Were you born this stupid, or did you have to practice?
Schneibster
15th November 2005 - 01:32 AM
QUOTE (Faux+)
Yeah... and still the Bankers Trust stood.
Were you too stupid to read my response to that idiotic assertion, or did you not actually read my post? I'm not going to post it twice. Asked and answered. Move along, nothing to see here.
frater plecticus
15th November 2005 - 01:39 AM
Schneibster, you are wrong about the lack of wtc 7 steel samples. It´s on the official record.
QUOTE
8.2.8 Appendix C: Limited Metallurgical Examination
Two structural steel samples from the WTC site were observed to have unusual erosion patterns. One sample is believed to be from WTC 7 and the other from either WTC 1 or WTC 2
http://www.house.gov/science/hot/wtc/wtc-report/WTC_ch8.pdfchapter 8
Schneibster
15th November 2005 - 02:08 AM
QUOTE (frater plecticus+)
Schneibster, what is your current hypothesis for the WTC 7 collapse ?
Haven't got one; I'll try to develop it below. What I do have is a lot of evidence that a lot of people are ignoring or glossing over, combined with a bunch of old links to outdated information that has been superceded by later analysis and is now being trumpeted as "da gummint lying." Does the government lie? D**n straight they do- Shrub lied to Congress, and then got on TV and told the same lies to the rest of us, too, in order to start a war. Tricky Dicky sure did lie- "I am not a crook" my a**. But if you're going to criticize an ongoing research effort, DON'T post old versions of it, and DON'T call interim conclusions that are clearly identified as hypotheses "lies."
Stick to the facts; that's the only way you'll get anywhere. Make sure you are competent to analyze the math, and that you understand the engineering principles involved. If you don't, and you ask politely, you'll get a polite explanation. If you want to see how it's done, you might try my ongoing thread on polarization with hexa. Hexa observes that what s/he's seeing and what I'm saying seem different- but never calls me a liar. S/he is polite and points out the discrepancies and asks for an explanation. I happily provide one. If you don't understand where I got a particular equation, or how I made a step from one form to another, ask. I'll happily explain. DON'T call me a liar, and DON'T make nasty comments about me being a "shill" of some sort; I'm unlikely to be polite after that. Considering that the majority of people on this site probably understand what I'm talking about, and why I did the equations the way I did, and where I got them from, basically all that's going to do is make you look like an idiot, like Faux.
I tell you this because you appear to be genuinely curious; and you are being relatively polite. I choose to respond in kind.
The evidence is:
1. There was massive damage to 7 WTC from flying perimeter columns. This was considerably in excess of the damage done to Banker's trust, and apparently penetrated to the second row of interior load-bearing columns from the South face, compromising at least four columns in the first row and at least two in the second. This conclusion is based on multiple pieces of testimentary evidence, some of which I have provided links to here. There is, unfortunately, no accompanying photographic evidence, partly because the entire South face was covered with smoke from the time it was damaged (the fall of 1 WTC) to the time that the building collapsed, and partly because the only realistic vantage point would have been right in the middle of the pile of 1 WTC rubble.
2. The collapse of 7 WTC began inside the building. This is based on the fact that the East penthouse was the first thing to go, followed by the West penthouse and the curtain wall between them; finally, after all that, the global collapse began. But the interior of the building by that time was no longer a load-bearing structure. Finally, examining aerial views of the building after the collapse, we find perimeter sections on top of the pile of debris, indicating that all of the interior had already fallen.
3. The collapse of 7 WTC started with a vertical failure on the East side of the building, most likely in column 79, next most likely in column 80. The supporting evidence for this is the breaking windows in a line running up the North face to the East penthouse, followed by the East penthouse developing a kink in its roof directly over the line of breaking windows, and not coincidentally directly over column 79 and very close to column 80.
4. This vertical failure caused the east side of the building's interior to collapse due to diaphragm failures (diaphragms are floors, which transfer some of the stress on the perimeter columns to interior columns) in the structures that were no longer supported by the column that had broken and initiated the vertical failure. This is evident from the fact that the sky is visible in the upper story windows below the East penthouse after its collapse.
5. This interior collapse caused a horizontal progressive failure across the area between floors 5 and 7, of the horizontal trusses that distributed weight from the upper building columns to the original ground-level columns that were put in with the Con Ed power station. These horizontal trusses were deformed and pulled down by the local collapse on the East side. I have no direct evidence to support this assertion, but the subsequent events almost require it; please read on.
6. This horizontal progressive failure caused a corresponding interior progressive collapse that proceeded up the building to the roof and caused the disappearance of the West penthouse and the curtain wall. The evidence for this is the disappearance of those structures, and the subsequent view of the sky through the top windows on the West side.
7. During this horizontal progressive failure, an enormous load was placed on the balance ends of the North side cantilevers; this load was transferred by the cantilevering beams and the weight of the North facade to the pivot beams, which were columns on the North side of the building inset about 9 feet into the building. When the full load came on these pivot beams, they failed. I also have no supporting evidence for this assertion; and again, the subsequent events almost require it.
8. Now the North perimeter begins to fall, with a "kink" near the damage caused by the original failure on the East side near column 79. It is falling because the pivots below its cantilevered support have failed. It falls 5 to 7 floors. The supporting evidence is on video; the building appears to "fall into the ground," indicating that there is no interior structure any more, and that the bottom level has failed.
9. The North perimeter strikes the ground, sending a wave of systematic breakage up the facade which reaches the top slightly before it hits the ground. There is no interior of the building, because it has all already collapsed. The evidence again is on video.
How's that work for you?
Edited to add: You will note that I have not proposed a failure mechanism for column 79 (or 80, whichever). I don't know enough to do that, and I suspect no one ever will; although if they can show that the crystalline structure of a piece of steel from 7 WTC was altered by high temperatures, considering the inferno that raged on the 12 floor, I'd say we'll know as much as we ever will. Hint: how does Young's modulus of steel vary with temperature, and how does that affect the yield strength of the steel? At what temperature would the yield strength be below the stress a column is under, if the diaphragm supports for the column had been damaged by flying debris from the 1 WTC collapse? How many floors would have to no longer be supporting that column at the likely temperatures of the fire before it would fail? That's how to do this. I'll leave it to the experts; I'll look their figures over when they're done. The half-baked version is available on NIST's site.
Schneibster
15th November 2005 - 02:10 AM
QUOTE (frater plecticus+)
Schneibster, you are wrong about the lack of wtc 7 steel samples. It´s on the official record.
Wrong precisely how? How is what you posted in disagreement with anything that I said?
Foxx
15th November 2005 - 05:02 AM
frater plecticus said - "
Schneibster, you are wrong about the lack of wtc 7 steel samples. It´s on the official record."
schneibster replies -- "
Wrong precisely how? How is what you posted in disagreement with anything that I said?Well, this is what you posted...
QUOTE
by Schneibster
You might try this one which says, "No structural elements have been positively identified from WTC 7." Obviously, that is within the purview of the team making this report; they're not responsible for you being stupid enough to think that they are aware of every team out there investigating this dog's breakfast, by some sort of osmosis or omniscience or something. If you're that stupid, you probably shouldn't be posting on the Internet.
We are well aware what NIST is saying... "no steel was recovered from WTC 7". This flies in the face of numerous government and official sources who report steel samples were collected from WTC 7 and saved for further study.
Here's one example of these documents posted by frater plecticus...
8.2.8 Appendix C: Limited Metallurgical Examination
Two structural steel samples from the WTC site were observed to have unusual erosion patterns. One sample is believed to be from WTC 7 and the other from either WTC 1 or WTC 2
http://www.house.gov/science/hot/wtc/wtc-report/WTC_ch8.pdf chapter 8
I listed numerous other references in my post
"NIST Caught Trying to Bury Evidence".
I can't tell you the real reason behind their lying about this (although I have my suspicions)...

however, it is
fact that they are lying, and therefore must have some purpose in lying about the fact that wtc 7 steel was recovered for study, and are now trying to 'bury' this forensic evidence.
manifespo
15th November 2005 - 05:44 AM
Michael Moore owns thousands of Halliburton shares- he is a corporate shill!
Professor Jones was on the Situation Room with Tucker Carlson on MSNBC at around 11:30 PM tonight.
Tucker Carlson wouldn't show the clip of WTC7 collapsing even though Proessor Jones had emailed him THE video of the collapse.
Someone work on getting a transcript of the interview- I felt Prof. Jones nailed it.
Tucker apologized after the commercial break for the Twin Towers segment.
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