Propeller Prep A soldier prepares a UH-60 Black Hawk on Joint Base Lewis-McChord, Wash., Jan. 9, 2016, to fly to the National Training Center on Fort Irwin, Calif. The soldier is assigned to the 7th Infantry Division's 2nd Battalion, 158th Aviation Regiment, 16th Combat Aviation Brigade. U.S. Army photo by Capt. Brian Harris SHARE: Download: Full Size (0.94 MB) Credit: Capt. Brian Harris VIRIN: 160109-A-LP538-022.JPG Photo Gallery