Space Shuttle Atlantis lands at Kennedy Space Center July 21, 2011 in Cape Canaveral, Florida. Atlantis was the shuttle final mission for NASA, ending the 30 years of the shuttle program. (Joe Raedle/Getty Images)
Space Shuttle Atlantis lands at Kennedy Space Center July 21, 2011 in Cape Canaveral, Florida. Atlantis was the shuttle final mission for NASA, ending the 30 years of the shuttle program. (Joe Raedle/Getty Images)
