U.S. Air Force Senior Airman Eric Smith, 1st Aircraft Maintenance Squadron assistant dedicated crew chief, explains the Portable Maintenance Aide system to Maj. Gen. Steve Hoog, 9th Air Force commander, during the Time Compliance Tech Order demonstration at Langley Air Force Base, Va., Sept. 15, 2011. General Hoog’s visit to Langley was to observe the TCTO demonstration of the F-22 Raptor and observe how Langley protected critical infrastructure during Hurricane Irene. (U.S. Air Force photo by Staff Sgt. Jeff Nevison/Released)