Drilling Duty Airmen use a concrete drill to make a hole through a wall to search for possible simulated casualties during a training scenario as part of Vigilant Guard 2016 at Camp Johnson in Colchester, Vt., July 30, 2016. Air National Guard photo by Senior Airman Jonathon Alderman SHARE: Download: Full Size (0.34 MB) Tags: guard, air force, training, airmen Credit: Senior Airman Jonathon Alderman VIRIN: 160730-Z-QG327-0603A.JPG Photo Gallery