Scientists watch soldiers sample simulated leaking chemical weapons in an underground facility in order to get a better idea of both the bulky protective gear soldiers must wear as well as the dark, constrained environments they sometimes work in. (Photo by Stacy Smenos, Dugway Proving Ground)
Airmen from the 90th Missile Maintenance Squadron prepare a reentry system for removal from a launch facility, Feb. 2, 2018, in the F. E. Warren Air Force Base missile complex. The Defense Threat Reduction Agency issued a Broad Agency Agreement on April 16 seeking new nuclear threat technology. (U.S. Air Force photo by Airman 1st Class Braydon Williams)
Soldiers of the 53rd Weapons of Mass Destruction Civil Support Team, Indiana National Guard, take radiation readings during an Arctic Eagle 16 simulated radiological dispersal device blast at Camp Grayling Joint Maneuver Training Center, Mich., April 5, 2016. (U.S. Air National Guard photo by Master Sgt. David Kujawa/Released)
Airmen from the 90th Missile Maintenance Squadron prepare a reentry system for removal from a launch facility, Feb. 2, 2018, in the F. E. Warren Air Force Base missile complex. The Defense Threat Reduction Agency issued a Broad Agency Agreement on April 16 seeking new nuclear threat technology. (U.S. Air Force photo by Airman 1st Class Braydon Williams)