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

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Photo by: Senior Airman Joshua R. M. Dewberry |  VIRIN: 150317-F-BG094-068.JPG