A U.S. Army crew chief mans a door gun as his UH-60 Black Hawk helicopter follows Mi-17 helicopters during a training air assault mission led by an Afghan air unit in Afghanistan's Kandahar province, Feb. 29, 2012. The crew chief is assigned to Company A, 2nd Battalion, 25th Aviation Regiment, 25th Combat Aviation Brigade. A U.S. Army crew chief mans a door gun as his UH-60 Black Hawk helicopter follows Mi-17 helicopters during a training air assault mission led by an Afghan air unit in Afghanistan's Kandahar province, Feb. 29, 2012. The crew chief is assigned to Company A, 2nd Battalion, 25th Aviation Regiment, 25th Combat Aviation Brigade. SHARE: Download: Full Size (3.2 MB) Tags: photo essays Credit: VIRIN: 289125-K-DIH31-271.jpg Photo Gallery