Petty Officer 2nd Class Joshua M. Sanders (right), a machinery technician assigned to Coast Guard Maritime Force Protection Unit Bangor in Silverdale, Wash., demonstrates how to use the weapons system onboard a 64-foot Special Purpose Craft -- Screening Vessel to Christopher Marten (left), a Washington state resident with exceptional needs, while underway in Hood Canal, July 9, 2014. Marten and his father, a former Marine, have visited Coast Guard units across the country. (U.S. Coast Guard photo by Petty Officer 3rd Class Katelyn Shearer)