Matt Brady, 11 Civil Engineer Squadron fire fighter, sites the safest path to travel while carrying a victim who was injured in a mock mass causality disaster in the commissary at the Center for National Response in Gallagher, W. Va, March 31, during exercise Black Flag. Members from Joint Base Andrews participated in five days of exercises for first responders, emergency management and bioenvironmental personnel. (U.S. Air Force photo by Senior Airman Melissa V. Brownstein)