39th APS memorial run
Members of the 39th Aerial Port Squadron begin their 5K Memorial Run May 7, 2017 in Capt. David Lyon Memorial Park, Peterson Air Force Base, Colo. Aerial Port Squadrons from all over the world run in May as part of National Defense Transportation events to remember their fallen brothers and sisters. Capt. David Lyon, 21st Logistics Readiness Squadron, stationed at Peterson Air Force Base, Colo., was killed in December 2013 by a vehicle-borne improvised explosive in Kabul, Afghanistan. (U.S. Air Force photo/Daniel Butterfield)