Especially in the light of intercepted military communications from the Japanese discussing an attack on the US. On the other hand, it seems odd that the military, even in the event of a conspiricy, would allow the fleet there to be so unprepared. Sure, they needed something to goad the American public into war, but any attack would have sufficed - why allow something so devastating? Our ability to rebuild and turn to a war economy was hardly assured. Government incompetence is more common than conspiricy.