Staff Sgt. Steven Stein, a joint terminal air controller from the 11th Air Support Operations Squadron, 3rd Air Support Group, which supports the U.S. Army's 3rd Armored Calvary Regiment, Fort Hood, Texas, keys his microphone to pass targeting instructions to an A-10C overhead (not shown) during a joint training exercise at the Bollen Live-Fire Range Complex on Feb. 6, 2014, Fort Indiantown Gap, Pa. JTAC controllers, like Stein, are working with C-17A Globemaster III and A-10C Thunderbolt II aircraft in the mountainous, snowy terrain of central Pennsylvania. (U.S. Air Force photo/Greg L. Davis)
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