"A Gallup poll in 1991 showed that 1 in 3 Americans believed that President Franklin Roosevelt knew about the eventual attack on Pearl Harbor beforehand, and allowed it to happen in order to coerce the Congress and public to support entry into the then-European War. It was the 50th anniversary of a Gallup poll in 1941 that showed 84% believed the President did all he could to prevent war. Despite a plethora of declassified documents to the contrary, many Americans today still believe that the attack on Pearl Harbor was a surprise. "