Senior Airman Bonnie Wilson (left) gets some tips from Staff Sgt. Tim Bush on the use of a land map navigator in preparation for Exercise Foal Eagle '99 at Osan Air Base, Korea, on Oct. 20, 1999. Exercise Foal Eagle '99 is the 38th in a series of regularly scheduled rear area defense field training exercises. The annual exercise is held at a variety of locations throughout the Korean peninsula and involves some 30,000 U.S. military forces. Wilson and Bush are attached to the 62nd Security Forces Squadron, McChord Air Force Base, Wash.