Marine Corps Aviation Ground Support students fill a crater with dirt during an airfield damage repair practical application on Canon Air Defense Complex near Yuma, Ariz., Sept. 20, 2014. Marine Corps Aviation Ground Support students fill a crater with dirt during an airfield damage repair practical application on Canon Air Defense Complex near Yuma, Ariz., Sept. 20, 2014. SHARE: Download: Full Size (2.07 MB) Tags: Photo Essays Credit: VIRIN: 447180-V-WIL35-811.jpg Photo Gallery