Members of 289th Military Police Company detain a role-player on the Fort McNair portion of Joint Base Myer-Henderson Hall Sept. 25, 2014. During the exercise, a role-player portraying an active shooter entered buildings on the joint base and JBM-HH 289th Military Police Company, Directorate of Emergency Services and MPDC responded. (Joint Base Myer-Henderson Hall PAO photo by Rachel Larue)