Lance Cpl. Kolten Langenwalter, a Base Defense Augmentation Force Marine, fires a MK 19 Mod 3 40mm grenade machine gun during weapons familiarization training aboard Camp Leatherneck, Afghanistan. Each unit aboard Camp Leatherneck augments Marines to support BDAF. Marines from 3rd Marine Aircraft Wing (Forward), such as Langenwalter, serve in aviation support and administration roles and volunteered to deploy to fill BDAF’s vital role. - Lance Cpl. Kolten Langenwalter, a Base Defense Augmentation Force Marine, fires a MK 19 Mod 3 40mm grenade machine gun during weapons familiarization training aboard Camp Leatherneck, Afghanistan. Each unit aboard Camp Leatherneck augments Marines to support BDAF. Marines from 3rd Marine Aircraft Wing (Forward), such as Langenwalter, serve in aviation support and administration roles and volunteered to deploy to fill BDAF’s vital role.