MARINE CORPS AIR GROUND COMBAT CENTER TWENTYNINE PALMS, Calif. - CH-53E Super Stallion helicopter crew chiefs from Marine Heavy Helicopter Squadron 772, Sgt. Robert Brensinger, Sgt. Greg Farren, and Staff Sgt. David Scranton prepare fuel lines for a ground refueling mission here while Cpl. Kevin McClernon keeps an eye on the aircraft during Exercise Javelin Thrust July 9. Javelin Thrust is an annual large-scale exercise which allows active and reserve Marines and sailors from 38 different states to train together as a seamless Marine Air Ground Task Force. (photo by Master Sgt. Chris W. Cox)