Noe Cordero, foreground, a member of the San Diego Police Department (SDPD) Special Weapons and Tactics team, acts as an assailant while U.S. Navy Master-at-Arms 2nd Class David Scott and other observers follow him during an active shooter drill at Naval Branch Health Clinic San Diego in San Diego, Calif., Aug. 23, 2013. The drill tested the hospital's security response and shelter in place policies in coordination with the SDPD.