April 12, 1945: After years of bloody conflict in Europe and the Pacific, America is stunned by news of President Franklin D. Roosevelt’s death. In an instant, Vice President Harry Truman, who has been kept out of war planning and knows nothing of the top-secret Manhattan Project to develop the world’s first atomic bomb, must assume command of a nation at war on multiple continents --- and confront one of the most consequential decisions in history. COUNTDOWN 1945 tells the gripping true story of the turbulent days, weeks and months to follow, leading up to August 6, 1945, when Truman gives the order to drop the bomb on Hiroshima.