Forty-three seconds later, at 1,890 feet above ground zero, it exploded in a nuclear inferno that left tens of thousands dead and dying and turned much of Hiroshima, a city of some 250,000 at the time, into a scorched ruin.Įstimates for the dead and injured in the bombing have varied widely over the years. local time, the bomb known to its creators as Little Boy dropped free at an altitude of 31,000 feet.
