190321-N-GC639-21003 ARABIAN GULF (March 21, 2019) A security reaction force aboard the guided-missile destroyer USS Spruance (DDG 111) responds to a security threat during an anti-terrorism force protection drill in the Arabian Gulf, March 21, 2019. The Spruance is deployed to the U.S. 5th Fleet area of operations in support of naval operations to ensure maritime stability and security in the Central Region, connecting the Mediterranean and the Pacific through the western Indian Ocean and three strategic choke points. (U.S. Navy photo by Mass Communication Specialist 1st Class Ryan D. McLearnon/Released)