Hand Signals An Army jumpmaster communicates using hand signals before a training jump out of a C-17 Globemaster III to prepare the for Arctic Thunder Open House at Joint Base Elmendorf-Richardson, Alaska, July 20, 2016. Air Force photo by Senior Airman James Richardson SHARE: Download: Full Size (1.46 MB) Tags: Soldiers, Army Credit: Senior Airman James Richardson VIRIN: 160720-F-GO452-429A.JPG Photo Gallery