It is my belief that the only thing Roosevelt did not know about the Pearl Harbor attack was when it was coming.
History has taught us that a weak military invites attack.
We were weak at the time of the Pearl Harbor Attack, and we are weak now. And getting weaker every day.
It is almost like asking Willie Sutton why he robbed banks. Because that is where the money is. Why did the Japanese attack Pearl Harbor? Because that is where the Navy was. I find it hard to swallow, that some high ranking officials did not know it was coming.