From the early-morning onslaught to FDR's famous message to congress, historian Steven M. Gillon revisits the first twenty-four anxious and emotional hours after Pearl Harbor-a pivot point that swept America into World War II. Pearl Harbour was the defining event of the 20th century - it changed the global balance of power, set the stage for the Cold War, and allowed the United States to emerge as a global superpower - and so December 7th, 1941 is perhaps its defining day. It is the day that ended the Great Depression, changed the course of FDR's presidency, and swept America into World War Two. Rarely has there been a more dramatic twenty-four-hour period in American history. Roosevelt learned of the Japanese attack at 1:47 pm on Sunday afternoon, December 7, 1941. By that time the following day, FDR had already delivered his war message to a joint session of Congress. The twenty-four hours between serve as an historical fault-line where one era ends and a new one begins. In "Pearl Harbor", Gillon presents readers with a deeply-researched and dramatic examination of America's most infamous day.