The Hexagon KH-9 reconnaissance satellite, a formerly classified reconnaissance satellite, went on display in the Cold War Gallery at the National Museum of the U.S. Air Force in Dayton, Ohio, starting Jan. 26, 2012. Eventually, the satellite, along with two other reconnaissance satellites, will be placed in the museum's planned fourth building, which will house the Space Gallery, Presidential Aircraft Gallery and Global Reach Gallery. (U.S. Air Force photo)