NAVAL STATION ROTA, Spain, (March 30, 2021) Master-at-Arms 1st Class Nicholas Klein simulates a response to an active shooter during an active shooter drill at Naval Station Rota, Spain, March 30, 2021. The purpose of this exercise is to validate the installation antiterrorism (AT) plan, preplanned responses (PPRs) and standard operation procedures (SOPs) for responding to an active shooter. (U.S. Navy photo by Mass Communication Specialist 2nd Class Eduardo Otero)