U.S. service members attending Naval School Explosive Ordnance Disposal (NAVSCOLEOD) conduct chemical biological handling of hazardous materials and decontamination during a simulated cave training exercise at Eglin Air Force Base, Fla., March 8, 2017. The purpose of NAVSCOLEOD is to train technicians in basic, as well as advanced, courses to perform various duties that include locating, identifying, rendering safe, and disposing of bombs and other hazardous materials. (U.S. Marine Corps photo by Cpl. Laura Mercado)

U.S. service members attending Naval School Explosive Ordnance Disposal (NAVSCOLEOD) conduct chemical biological handling of hazardous materials and decontamination during a simulated cave training exercise at Eglin Air Force Base, Fla., March 8, 2017. The purpose of NAVSCOLEOD is to train technicians in basic, as well as advanced, courses to perform various duties that include locating, identifying, rendering safe, and disposing of bombs and other hazardous materials. (U.S. Marine Corps photo by Cpl. Laura Mercado)

U.S. service members attending Naval School Explosive Ordnance Disposal (NAVSCOLEOD) conduct live fire explosive training at Eglin Air Force Base, Fla., March 8, 2017. The purpose of NAVSCOLEOD is to train technicians in basic, as well as advanced, courses to perform various duties that include locating, identifying, rendering safe, and disposing of bombs and other hazardous materials. (U.S. Marine Corps photo by Cpl. Laura Mercado)

U.S. service members attending Naval School Explosive Ordnance Disposal (NAVSCOLEOD) conduct chemical biological handling of hazardous materials and decontamination during a simulated cave training exercise at Eglin Air Force Base, Fla., March 8, 2017. The purpose of NAVSCOLEOD is to train technicians in basic, as well as advanced, courses to perform various duties that include locating, identifying, rendering safe, and disposing of bombs and other hazardous materials. (U.S. Marine Corps photo by Cpl. Laura Mercado)

U.S. service members attending Naval School Explosive Ordnance Disposal (NAVSCOLEOD) conduct chemical biological handling of hazardous materials and decontamination during a simulated cave training exercise at Eglin Air Force Base, Fla., March 8, 2017. The purpose of NAVSCOLEOD is to train technicians in basic, as well as advanced, courses to perform various duties that include locating, identifying, rendering safe, and disposing of bombs and other hazardous materials. (U.S. Marine Corps photo by Cpl. Laura Mercado)

U.S. service members attending Naval School Explosive Ordnance Disposal (NAVSCOLEOD) conduct live fire explosive training at Eglin Air Force Base, Fla., March 8, 2017. The purpose of NAVSCOLEOD is to train technicians in basic, as well as advanced, courses to perform various duties that include locating, identifying, rendering safe, and disposing of bombs and other hazardous materials. (U.S. Marine Corps photo by Cpl. Laura Mercado)

U.S. service members attending Naval School Explosive Ordnance Disposal (NAVSCOLEOD) conduct chemical biological handling of hazardous materials and decontamination during a simulated cave training exercise at Eglin Air Force Base, Fla., March 8, 2017. The purpose of NAVSCOLEOD is to train technicians in basic, as well as advanced, courses to perform various duties that include locating, identifying, rendering safe, and disposing of bombs and other hazardous materials. (U.S. Marine Corps photo by Cpl. Laura Mercado)