Everyone knows about the first bombing of Pearl Harbor on December 7, 1941. Less well known, however, was the second attack. And there was almost a third. The first one was just a warm-up. The Imperial Japanese Navy planned several more attacks on the U.S. mainland - starting with California and Texas. It was called Ke-Sakusen (Operation Strategy), better known as "Operation K." Its aim was four-fold: (1) to assess the damage at Pearl Harbor; (2) to stop the ongoing rescue and salvage...