Senior Airman Ryan Palmberg, 27th Aircraft Maintenance Unit F-22 Raptor crew chief, inspects his gas mask while processing through a personnel deployment function line at Langley Air Force Base, Va., Feb. 26, 2011. The PDF line was part of a two-day Operational Readiness Exercise in which the 1st Fighter Wing, 633d Air Base Wing and 192d Fighter Wing worked together to test their ability to deploy Airmen on short notice. (U.S. Air Force photo by Staff Sgt. Logan Tuttle/Released)