[ILLUSTRATION OMITTED] Japan's stunning employment of air power on the first day of the Pacific War, in 1941, is readily acknowledged by most; but its corollary--the failure of U.S. air power in the Philippines and Hawaii is often overlooked. While this failure of American air power may be written off to the tactical--and operational--surprise achieved in Hawaii, this was hardly the case in the Philippines, where the U.S. Army Forces in the Far East (USAFFE) had many hours of warning. Both Hawaii and the Philippines had operational radar sets that tracked the incoming raids, yet Army Air Forces fighters failed to intercept the Japanese bombers. What went wrong? How did the technology that saved Britain in 1940 let America down?