Builder 2nd Class, from Macon, Ga., assigned to Naval Mobile Construction Battalion (NMCB) 5, fires an airsoft M4 carbine rifle inside a Navy category 3 synthetic training environment. The synthetic training environment provides safe and cost effective weapons training for service members prior to live-fire training evolutions. (U.S. Navy photo by Mass Communications Specialist 2nd Class Raul Moreno Jr./Released)