A member of Arlington County Technical Rescue practices a scenario during Capital Shield 2015 at the former Lorton Youth Detention Center in Lorton, Va., Sept. 25, 2014. Joint Force Headquarters-National Capital Region coordinated a joint training involving a total of 40 Department of Defense, federal and local agencies to perform mock mass casualty rescues. (Joint Base Myer-Henderson Hall PAO photo by Rachel Larue)