KENNEDY SPACE CENTER Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, vists with U.S. Sen. Patrick Leahy of Vermont and his son, Mark, at the launching of Space Shuttle Atlantis, NASA's final space shuttle mission, at Kennedy Space Center in Cape Canaveral, Fla., July 8, 2011. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 047407-U-SJT56-531.jpg Photo Gallery