U.S. Airmen with the 320th Special Tactics Squadron and the 31st Rescue Squadron carry a 200-lb. litter loaded with equipment and a training dummy during a memorial ruck march at Kadena Air Base, Japan, Oct. 25, 2019. The memorial honored Tech. Sgts. Peter Kraines and Sean Barnes who both died after sustaining injuries during training incidents in 2014 and 2019. (U.S. Air Force photo by Staff Sgt. Peter Reft)