An M-9 pistol rests in the safe position after being used during the Defender Challenge May 15, 2017, at Andersen Air Force Base, Guam. The 36th Security Forces Squadron hosted the Defender Challenge, pitting Airmen against a variety of obstacles and navigational tasks. The event was part of National Police week, which honors the service and sacrifice of law enforcement officers. (U.S. Air Force photo by Senior Airman Joshua Smoot)