Rotor Blade Ready Army crew chiefs check the front rotor blades on a CH-47D Chinook helicopter before a scheduled training mission over Greenville, S.C., July 22, 2016. The crew chiefs are assigned to the South Carolina Army National Guard’s Headquarters Company, 2nd Battalion, 151st Security Support Aviation Battalion. Army National Guard photo by Staff Sgt. Roby Di Giovine SHARE: Download: Full Size (2.18 MB) Tags: Guard, Soldiers, Army Credit: Staff Sgt. Roberto Di Giovine VIRIN: 160722-Z-II459-029A.JPG Photo Gallery