ARTA BEACH, Djibouti (Sept. 28, 2015) U.S. Marines with the 15th Marine Expeditionary Unit navigate through water obstacles alongside soldiers from the French 5th Overseas Combined Arms Regiment (RIAOM) during a desert survival course. Elements of the 15th MEU are training with the 5th RIAOM in Djibouti in order to improve interoperability between the MEU and the French military. (U.S. Marine Corps photo by Sgt. Steve H. Lopez/Released)