171225-M-UX416-023 U.S. 5TH FLEET AREA OF OPERATIONS (Dec. 25, 2017) U.S. and French service mebers participate in a Christmas physical fitness challenge aboard the French navy Mistral-class amphibious assault ship LHD Tonnerre (L9014). Tonnerre, with embarked Marines and Sailors from the 15th Marine Expeditionary Unit (15th MEU) and Naval Amphibious Force, Task Force 51/5th Marine Expeditionary Brigade, is conducting maritime security operations within the U.S. 5th Fleet area of operations to ensure regional stability, freedom of navigation and the free flow of commerce. (U.S. Marine Corps photo by Sgt. Jessica Y. Lucio/Released)