The First Sea Lord and Chief of Naval Staff of the British Royal Navy, Adm. Sir George Zambellas, poses for a photo aboard during a flight aboard a U.S. Marine Corps MV-22 Osprey tiltrotor aircraft from Marine Helicopter Squadron 1 (HMX-1) in Northern Virginia, July 29, 2014. Zambellas is taking part in the Commandant of the Marine Corps' Counterpart Program, which invites foreign military leaders to visit the United States and interact with U.S. military leaders. (U.S. Marine Corps photo by Cpl. Michael C. Guinto/Released)