What you need to know
It is August 9, 1945. Three days ago America dropped an atomic bomb on Hiroshima, hoping in vain to force Japan into unconditional surrender. The decision has been made to use a second of these weapons.
That bomb will very nearly not be dropped. What follows are the events of that mission, told in real time.
The American bomber convoy expects to reach its target at about 9.40am — all times are local to Japan.
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