Bilateral Keen Sword Exercise begins
U.S. Air Force Maj. John Greven, 5th Air Force exercise control group lead, briefs American and Japanese pilots during Keen Sword 2013 at Misawa Air Base, Japan, Nov. 7, 2012. During the briefing, Greven informed the pilots on expected weather conditions and their temporary chain of command to be used throughout the 12-day exercise. (U.S. Air Force photo by Airman 1st Class Kenna Jackson)