Master Chief Petty Officer of the Coast Guard Jason Vanderhaden speaks with U.S. Army Command Sgt. Maj. John W. Troxell, Senior Enlisted Advisor to the Chairman (SEAC) of the Joint Chiefs of Staff and Croatian Armed Forces Command Sgt. Maj. Davor Petek, Senior Enlisted Leader for Supreme Headquarters Allied Powers Europe (SHAPE) while an underway patrol with Coast Guard Station Washington D.C., Monday, July 16, 2018. The Coast Guard partners with the Department of Defense to ensure defense readiness and interoperability, cyber security, research and development, counternarcotics, disaster preparedness and emergency response, training, logistics, and acquisitions. Coast Guard photo by Chief Petty Officer Mariana O'leary.