Staff Sgt. David Guba, 1st Maintenance Squadron non-destructive inspection craftsman, reads 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 633d Air Base Wing, 1st Fighter Wing and 192d Fighter Wing worked together to test their ability to deploy Airmen, aircraft and cargo on short notice. (U.S. Air Force photo by Airman 1st Class Camilla Elizeu/Released)