The Baker shot had two purposes. To test the Mk-4 bomb assembly without using a uranium tamper, and also to document basic nuclear explosion phenomena. The bomb was airdropped by the B-50 “Rosebud” at 7:02 local time 340 meters above Area 7 of Yucca flat. Pine needles, leaves and grass were positioned at six along the blast line to measure the effects of a nuclear detonation on forests. Dogs, rats and various fabrics were exposed to determine the effects of the thermal pulse on unprotected skin. Flash blindness studies were also conducted, with 17 volunteers aboad a C-17 viewing the detonation through a variety of different lenses and goggles.