Reading Blueprints Air Force Tech. Sgt. Bryant Martin listens to radio traffic as he reviews blueprints while serving as the temporary on-scene commander during an active-shooter exercise at Wright-Patterson Air Force Base, Ohio, Aug. 2, 2017. Martin is a flight chief assigned to the 88th Security Forces. The exercise was held as part of the requirement set for military installations to hold active shooter exercises twice a year. Air Force photo by Wesley Farnsworth SHARE: Download: Full Size (1.52 MB) Tags: Air Force, Northern Command, training, Airmen Credit: Wesley Farnsworth VIRIN: 170802-F-AV193-1002A.JPG Photo Gallery