U.S. Army paratroopers provide first aid to a simulated casualty during Exercise Sky Soldier II on the Bechyne Training Area in the Czech Republic, Sept. 23, 2015. Sky Soldier is a series of bilateral exercises designed to increase interoperability and strengthen partnerships between NATO airborne forces. The paratroopers are assigned to the 1st Squadron, 91st Cavalry Regiment, 173rd Airborne Brigade. U.S. Army photo by Markus Rauchenberger