Airmen from the 5th Bomb Wing and 16th Electronic Warfare Squadron participate in Combat Shield at Minot Air Force Base, N.D., July 12, 2017. Combat Shield is an evaluation for assessing the electronic warfare readiness of aircraft. (U.S. Air Force photos/Senior Airman J.T. Armstrong)

Maj. Raymond Kilroy, 5th Operation Support Squadron wing electronic warfare officer, speaks with ground crew from inside a B-52H Stratofortress during Combat Shield at Minot Air Force Base, N.D., July 12, 2017. Kilroy monitored and analyzed test radio frequencies generated by engineers on the ground. (U.S. Air Force photo/Senior Airman J.T. Armstrong)

Maj. Raymond Kilroy, 5th Operation Support Squadron wing electronic warfare officer, speaks with ground crew from inside a B-52H Stratofortress during Combat Shield at Minot Air Force Base, N.D., July 12, 2017. Kilroy monitored and analyzed test radio frequencies generated by engineers on the ground. (U.S. Air Force photo/Senior Airman J.T. Armstrong)

Maj. Raymond Kilroy, 5th Operation Support Squadron wing electronic warfare officer, pushes a hard-wired power switch for ALQ-172 auxiliary during Combat Shield at Minot Air Force Base, N.D., July 12, 2017. Combat Shield is an evaluation for assessing the electronic warfare readiness of aircraft. (U.S. Air Force photos/Senior Airman J.T. Armstrong

A B-52H Stratofortress is parked during Combat Shield at Minot Air Force Base, N.D., July 12, 2017. Combat Shield is an evaluation for assessing the electronic warfare readiness of aircraft. (U.S. Air Force photos/Senior Airman J.T. Armstrong)

Rein Haas, 16th Electronic Warfare Squadron test engineer, directs a horn antenna during Combat Shield at Minot Air Force Base, N.D., July 12, 2017. The antenna is used for transmitting radio frequencies that are received and analyzed by the electronic warfare officer inside an aircraft. (U.S. Air Force photo/Senior Airman J.T. Armstrong)