Pearl Harbor

I think the fact that the Japanese could pull off bombing one of our biggest navel bases is interesting.  I cant believe how they got away with it though considering we were the ones supply their ammo, guns, and oil.  When we cut their oil supplies, we had to have know that they were going to do something to retaliate. I also find it interesting that all our aircraft carriers were away at the exact day that we were bombed. Did we really know about it.