Capt. Brian Willis, 4th Airlift Squadron, describes the features of a load training device to Army Gen. Martin Dempsey, Chairman of the Joint Chiefs of Staff, Oct. 4, 2012, at Joint Base Lewis-McChord, Wash. Dempsey completed his four-day visit to the Seattle and Tacoma area with several briefings and a small tour of McChord Field. (U.S. Air Force photo/Staff Sgt. Sean Tobin)