U.S. soldiers conduct aerial door gunnery firing using a M240B machine gun from a CH-47 Chinook helicopter at a training site in southern Kandahar province, Afghanistan, Sept. 7, 2014. The soldiers are crew chiefs assigned to 1st Battalion, 52nd Aviation Regiment, 16th Combat Aviation Brigade, Task Force Flying Dragons. U.S. soldiers conduct aerial door gunnery firing using a M240B machine gun from a CH-47 Chinook helicopter at a training site in southern Kandahar province, Afghanistan, Sept. 7, 2014. The soldiers are crew chiefs assigned to 1st Battalion, 52nd Aviation Regiment, 16th Combat Aviation Brigade, Task Force Flying Dragons. SHARE: Download: Full Size (1.99 MB) Tags: Photo Essays Credit: VIRIN: 317713-F-LZQ76-388.jpg Photo Gallery