CMAFS Smoke Grenade training
PETERSON AIR FORCE BASE, Colo. - Master Sgt. Crisanto Quinto, 721st Security Forces Squadron, noncommissioned officer in charge of training, pulls the pin and throws an M18 Smoke Grenade on Aug. 3, 2015 at Cheyenne Mountain Air Force Station. Once activated, the grenade produces a cloud of colored smoke for approximately 90 seconds. (Photo by Craig Denton)