Why did President Roosevelt consider December 7, 1941, a "date which will live in infamy"?

the answer is a glaciers carved a large valley that later flooded and became puget sound

nothing certain is known about what happened, but it seems that the country declined gradually, perhaps due to bad government, or, more likely, due to a series of bad harvests, which resulted in widespread and recurrent famine.

not to sure thinking it would be a hope this