A closeup of a D1 NATO-standard pressure locking fuel nozzle, left, used by Marines with Marine Wing Support Squadron 273, 26th Marine Expeditionary Unit (Special Operations Capable) (MEU(SOC)) at the forward aerial refueling point at the Kandahar International Airport, Kandahar, Afghanistan, during OPERATION ENDURING FREEDOM. On the right is a CCR (Closed-Circuit Refueling) nozzle, with a gravity feed adapter