A U.S. Air Force B-52H Stratofortress returning from deployment at Andersen Air Force Base, Guam, flies over the 50th Anniversary of the Battle of Long Tan and Vietnam Remembrance Day ceremony at Canberra, Australia, Aug. 18, 2016. At the request of the Australian government, two Pacific Air Forces B-52s already scheduled to fly a training mission in support of exercise Pitch Black, supported the event commemorating the U.S. and Australia's strong alliance during the Vietnam War that continues to this day. (U.S. Air Force photo by Staff Sgt. Sandra Welch)