150704-N-DQ840-104 LISBON, Portugal (July 4, 2015) The U.S. ambassador to Portugal, Robert Sherman, speaks with Marines during an Independence Day reception aboard the amphibious dock landing ship USS Fort McHenry (LSD 43) on July 4, 2015. Fort McHenry, part of the Iwo Jima Amphibious Ready Group/24th Marine Expeditionary Unit, is conducting naval operations in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe. (U.S. Navy Photo by Mass Communication Specialist 3rd Class Adam Austin/Released)