TOWER WATCH U.S. Air Force Senior Airman Sean Keniston Jr. observes the sunset from a watch tower during Global Medic 2011 on Fort Hunter Liggett, Calif., May 12, 2011. Keniston is assigned to the 42nd Aerial Port Squadron, Westover, Mass. Global Medic is a joint field training exercise for theater aeromedical evacuation system and ground medical components designed to replicate all aspects of combat medical service support. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 918496-D-LTE38-860.jpg Photo Gallery