Lance Cpl. Timothy Exley (left) and Sapper Tania Dawson (right) check the placement of explosive charges on a bridge to be demolished in the Shoalwater Training Area, Queensland, Australia, on Feb. 17, 1997, during exercise Tandem Thrust '97. Tandem Thrust is a combined military training exercise involving 28,000 personnel, 252 aircraft and 43 ships, and is designed to train U.S. and Australian staffs in crisis action planning and contingency response operations. Exley is attached to the U.S. Marine Corps 9th Engineering Support Battalion. Dawson is attached to the Australian 21st Construction Squadron.