Soldiers from the U.S. Army's 173rd Airborne Brigade prepare to load a CH-47 Chinook helicopter from B Company, 3-10 General Support Aviation Battalion, 10th Combat Aviation Brigade, at Bezmer Air Base, Bulgaria, on July 21. The Soldiers and Aviators were prepping for an all-night air assault training with the Greek and Canadian Armies as part of the final interoperability-building exercise of Saber Guardian 17 in the Black Sea Region. (U.S. Army photo by Spc. Thomas Scaggs) 170721-A-TZ475-280