Senior Airman Tony Pauline (left), rides with Senior Airmen Taylor Neuharth (right), during a chemical agent attack training exercise along the Memorial Tunnel at the Center for National Response in Gallagher, WV., March 17, 2015. This training is part of the annual Black Flag exercise for first responders. Pauline is a 779th Aerospace Medical Squadron bioenvironmental engineering technician and Nueharth is an 11th Civil Engineer Squadron emergency management journeyman, Joint Base Andrews, Md. (U.S. Air Force photo/Senior Airman Joshua R. M. Dewberry)