U.S. Air Force Staff Sgt. Willy Campos, 9th Physiological Support Squadron, explains the unique characteristics of the full pressure suits worn by U-2 Intelligence Reconnaissance and Surveillance aircraft pilots at the Capital City Air Show at Mather Airport, Sacramento, Calif., Sept. 8, 2012. The suits are very similar to NASA astronaut suits. (U.S. Air Force photo by Staff Sgt. Robert M. Trujillo/Released)