On today’s date in 1945, the world’s first atomic bomb, codenamed "Trinity," was successfully detonated on the Alamogordo Test Range Ground in the New Mexico desert. From 2 miles away, scientists and other observers watched as the Manhattan Project culminated in a mushroom cloud of blazing light rising 40,000 feet into the air. The blast generated the destructive power of 15,000 to 20,000 tons of TNT. From this moment, nuclear fission was no longer a theoretical possibility. Here was now a fearsome new force for either good or evil.
With Germany’s earlier surrender in May, the only remaining unvanquished enemy was Japan. America now had in her hands the means for bringing the war with Imperial Japan to a rapid close.