German newsreel of the first atomic explosion. Atomic bomb explosion in New Mexico. Pan of the Oak Ridge plant, the various buildings. The Post Office erected for the various employees in the community. Workman entering plant, passes being checked. A citizen looking at a town paper on the bulletin board. CU, Prof Ernest Lawrence, University of Calif at panel board in his laboratory. Directly following are different atomic bomb bursts filmed in slow motion. Slow motion footage of clouds of smoke from an atomic bomb.