180623-Z-QA585-073 Oscar Hernandez, second from left, a training specialist from the U.S. Army Space and Missile Defense Agency, shows Ohio Army National Guardsmen from the 1487th Transportation Company how to detect electromagnetic interference on an AN/PSN-13 Defense Advanced GPS Receiver, commonly known as a DAGR, June 23, 2018, during annual training at Camp Grayling Joint Maneuver Training Center in Grayling, Mich. This training provides soldiers guidance in the event they encounter a contested electronic warfare environment. Ohio Army National Guard photo by Staff Sgt. Michael Carden SHARE IMAGE: Download Image: Full Size (2.38 MB) Tags: Ohio Army National Guard, 137th Signal Company, Army, Ohio National Guard, Military, National Guard, Army National Guard, Ohio, GPS, Camp Grayling, Army Space and Missle Defense Command, Camp Grayling Joint Manuever Training Center Photo By: Staff Sgt. Michael Carden VIRIN: 180623-Z-QA585-073.JPG Photo Gallery