Immediately releasing to the world a sound 35mm colour film of the Trinity Test

What if America had decided to record a proper colour motion film of the July 1945 Trinity Test - only this time in 35mm and with sound ?

And if the test had worked, then releasing the film to the whole world ?
At the same time announcing to the Japanese the yield (in thousands of tons of TNT) from this test blast and describing its effects upon Japanese cities if released from single B-29 flying safely 35,000 feet above their puny air defences .

Even the largest raid to date on Japan, in fact the largest conventional bombing raid in history, had ,with 850 B-29s, released only about 25% of the yield of this single bomb, droppable by a single B-29.

Combining this future threat with the ongoing conventional air raids and the highly successful mining of Japanese sea lanes and harbours, this might have ended the war in September 1945 without a single A-bomb being dropped.

A-Bomb, invasion or slow starvation

The Japanese elite had willed that hundreds of thousands more of ordinary Japanese must die before surrender.

So Japanese deaths would probably have been as high or higher under this Plan B - people would have just starved slowly rather than being boiled to death instantly.

But the A-bomb, like gas and germ warfare , would have remained a vague threat rather than the active weapon all proud haughty nations just had to have to be seen as major powers.

I think we would have been better off....