Answer:
Presidents Franklin D. Roosevelt and Harry S. Truman
Step-by-step explanation:
Ahhhhh, these were such interesting and unprecedented times for the USA. FDR would go on to make history for being the only president to ever serve four terms, all the while battling his failing body, Congress striking down his acts, and the threat of Hitler to the United States and Great Britain.
When FDR's fourth term (prematurely) ended with his death, Harry S. Truman became president of the USA and during the remianing final months of WW2. Truman's most well-known decision was to drop the atomic bomb on Japan, resulting in massive destruction and casualties for Japan and the soon-to-be end of the war.