Lone sentry
Airman 1st Class Travis Thiele is a mobile response unit dedicated to the security of the deployed B-2 Spirit bombers. He is armed with an M-4 carbine, equipped with a mounted reflex sight. Airman Thiele can adjust the reticule in his gun sights to meet his objective of taking out an assailant attempting to damage this priority asset regardless of lighting or weather conditions. (Air Force photo/Senior Airman Brian Kimball)