U.S Army Reserve 1st Sgt. Class Chahutemoc Martinez, Truck Master for the 851st Transportation Company, based in Sinton, Texas, guides the delivery of a refrigerated conex during Vibrant Response and Guardian Response near Camp Atterbury, Indiana, Apr. 25, 2017. Vibrant Response and Guardian Response bring together military, federal and state agencies from throughout the continental U.S. for three weeks of collective training simulating the response to a catastrophic Chemical Biological Radiological Nuclear (CBRN) event in a major U.S. city. (U.S. Army Reserve Photo by Maj. Brandon R. Mace)