When Atlantis returns from an otherwise mundane delivery/janitorial mission to the ISS and lands on July 20, it will be the 42nd anniversary of Neil Armstrong and Buzz Aldrin walking on the Moon. When it lands, America will officially be without a means of putting a man in space, the first time in 30 years.
Here is a no nonsense site if you wish to track the ISS with a Space Shuttle. Some tracks will take it over the U.S. in a sunless sky.
http://iss.astroviewer.net/