Here's a link for the book"Preemptive Strike"The Lyons Press,2006.
http://www.preemptivestrikethebook.com/
It is well known that FDR didn't consider measures though perceived the Pearl Harbor attack by Japanese Navy beforehand.
It is assumed that there was a political judgment that start forming the
public opinions U.S. should participate in the war (WW2).
The attack to Japanese aircrafts by Flying Tigers has started earlier than Pearl hobor bombing.
Moreover, i learnt at the first time that the bombing to the japanese
cities had been planned by this book.
Anyway,IMO the Japan-US two countries had already to have rushed into war before December,1941.
regards,
Taka