US Marines in military exercise are flown by helicopters to site of atomic bomb blast at Yucca Flat, NV

Two helicopters taking off, others parked on ground in desert / bright light from atomic bomb blast, as brightness lessens mushroom cloud rising from ground is visible, yucca tree in foreground / helicopter flying low past yucca tree / shot from helicopter of helicopter in flight / shot from ground of two helicopters flying low overhead / aerial shot from helicopter of cloud / shot from helicopter of another helicopter in flight / helicopters on ground, blades spinning / two shots of two Marines fastening pallet loaded with containers to bottom of helicopter / two shots of pallet with containers on it being lifted by helicopter / two shots of helicopters carrying Marines taking off / shot from helicopter of helicopters flying in formation / shot from ground of helicopters flying low in formation / helicopter landing / four shots of Marines getting out of helicopters after they land / Marines running away from helicopter / shot from ground of helicopters flying overhead / Note: exact day not known