Airman 1st Class Jordan Johnson, a 380th Expeditionary Aircraft Maintenance Squadron avionics specialist, verifies the integrity of an RQ-4 Global Hawk antenna, using an identify friend or foe transponder April 15, 2014, at an undisclosed location in Southwest Asia. The IFF antenna allows other aircraft to recognize the Global Hawk as a friendly aircraft. (U.S. Air Force photo by Tech. Sgt. Russ Scalf/Released)