CLEVELAND — In war, there are no sure things.

When you are preparing for the largest amphibious invasion in human history, it's understandable why there would be anxiety if you were a president, a prime minister, a general or a private.

The Allied forces stood across the English Channel, waiting to execute Operation Overlord on June 6, 1944. On the other side was the heavily fortified German army, defending the coast of France.

The weather was not cooperating. In fact, the invasion had already been postponed once and there were fears among planners that any additional delays would force the operation to be pushed back to July due to high tides.

Arguably the most pivotal day of the 20th Century had arrived. Ready or not.

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