Marines fast rope from a Marine Corps UN-1Y Huey helicopter during a raid exercise on K-9 Village, Yuma Proving Ground, Ariz., Oct. 1, 2014. Marines fast rope from a Marine Corps UN-1Y Huey helicopter during a raid exercise on K-9 Village, Yuma Proving Ground, Ariz., Oct. 1, 2014. SHARE IMAGE: Download Image: Full Size (2.04 MB) Tags: Photo Essays Photo By: VIRIN: 010661-I-QIP35-910.jpg Photo Gallery