170709-N-ZW825-895 PACIFIC OCEAN (July 9, 2017) Operations Specialist 1st Class Charles Hammond monitors tracks aboard Arleigh Burke-class guided-missile destroyer USS Sterett (DDG 104) during an air defense exercise. Sterett is part of a combined U.S.-Australia-New Zealand expeditionary strike group (ESG), is undergoing a series of scenarios that will increase proficiencies defending the ESG against blue-water threats so amphibious forces can launch Marine forces ashore in the littorals. (U.S. Navy photo by Mass Communication Specialist 1st Class Byron C. Linder/Released)