5:30 A.M., Monday July 16th, 1945: The day dawned brighter than ever before over the New Mexico desert. But it was not the Sun's soothing rays that set the landscape alight; it was the radiant flash of the very first atomic bomb. Trinity, the nuclear offspring of the Manhattan Project, detonated with the force of 21,000 tons of TNT. The accompanying fireball reached temperatures of 8,430 degrees Kelvin, hotter than the surface of the sun, and sent a mushroom cloud of smoke and debris soaring more than seven miles into the sky. That day, every human on the planet was...