Sir William Patey, British ambassador to Afghanistan, addresses the crowd during a transfer of authority ceremony aboard Camp Leatherneck, Helmand province, Afghanistan, March 12, 2012. U.S. Marine Maj. Gen. Charles M. Gurganus, commanding general of I Marine Expeditionary Force (MEF) (Forward) (Fwd) assumed command of Regional Command (Southwest) from U.S. Marine Maj. Gen. John A. Toolan, commanding general of II MEF (Fwd).