William Harris (left) and Senior Airman Chris Lussier prepare to collect swipe samples aboard the WC-135 Constant Phoenix to determine if residue material is present that could affect the integrity of operational samples. The aircraft was on display at Patrick AFB, Fla., Oct. 25, 2012 to give Air Force Technical Applications Center and 45th Space Wing personnel the opportunity to tour the jet. The aircraft is permanently stationed at Offutt AFB, Neb., and its mission crew is responsible for operating and maintaining the advanced atmospheric research equipment aboard in support of the U.S. Atomic Energy Detection System. (U.S. Air Force photo by Susan A. Romano)