9/21/2012 - The space shuttle Endeavour flies over Vandenberg here Friday, Sept. 21, 2012. The Endeavour was the last shuttle to be built and its last mission was mission STS-134 in May 2011. (U.S. Air Force photo/2nd. Lt. Warren Smith)

9/21/2012 - The space shuttle Endeavour flies over Vandenberg here Friday, Sept. 21, 2012. The Endeavour was the last shuttle to be built and its last mission was mission STS-134 in May 2011. (U.S. Air Force photo/2nd. Lt. Warren Smith)

9/21/2012 - The space shuttle Endeavour flies over Vandenberg here Friday, Sept. 21, 2012. The Endeavour was the last shuttle to be built and its last mission was mission STS-134 in May 2011. (U.S. Air Force photo/Chris Ghormley)

9/21/2012 - The space shuttle Endeavour flies over Vandenberg here Friday, Sept. 21, 2012. The Endeavour was the last shuttle to be built and its last mission was mission STS-134 in May 2011. (U.S. Air Force photo/Michael Peterson)

9/21/2012 - Lt. Gen. Susan Helms, commander of U.S. Strategic Command's Joint Functional Component Command for Space and 14th Air Force (Air Forces Strategic), watches as the space shuttle Endeavour flies over Vandenberg here Friday, Sept. 21, 2012. Helms traveled to space in the Endeavour when she was an astronaut. (U.S. Air Force photo/Staff Sgt. Levi Riendeau)

9/21/2012 - The space shuttle Endeavour flies over Vandenberg here Friday, Sept. 21, 2012. The Endeavour was the last shuttle to be built and its last mission was mission STS-134 in May 2011. (U.S. Air Force photo/Staff Sgt. Levi Riendeau)