170908-N-GC965-124 INDIAN OCEAN (Sept. 8, 2017) Sailors assigned to the amphibious assault ship USS America (LHA 6) and the 15th Marine Expeditionary Unit (15th MEU) prepare to examine a simulated casualty during a casualty evacuation drill in support of exercise Alligator Dagger 2017. Alligator Dagger is a dedicated, unilateral combat rehearsal led by Naval Amphibious Force, Task Force 51, 5th Marine Expeditionary Brigade, in which combined Navy and Marine Corps units of the America Amphibious Ready Group and embarked 15th Marine Expeditionary Unit are to practice, rehearse and exercise integrated capabilities that are available to U.S. Central Command both afloat and ashore. (U.S. Navy photo by Mass Communication Specialist 2nd Class Ramon Go/Released)