U.S. Airmen with the 320th Special Tactics Squadron and the 31st Rescue Squadron conduct a memorial ruck march at Kadena Air Base, Japan, Oct. 25, 2019. In honor of pararescueman Tech. Sgts. Peter Kraines and Sean Barnes, who died after sustaining injuries during training incidents in 2014 and 2019, Airmen carried simulated patient litters, water cans, and over 1,000 lbs. of other equipment across five miles. Memorial marches such as this serve as a symbolic gesture of remembrance and camaraderie among U.S. military service members who have lost friends and family in the line of duty. (U.S. Air Force photo by Staff Sgt. Peter Reft)