Members of the 633rd Security Forces Squadron from Joint Base Langley-Eustis, Virginia, walk through a red smoke grenade after completing a medical evacuation drill during a field training exercise at Marine Corps Base Quantico, Virginia, August 1, 2019. To help hone their skills, members of the 633rd SFS were instructed by Airmen who were Ranger-qualified.(U.S. Air Force photo by Airman 1st Class Marcus M. Bullock)