Above -- In Teheran, Iran, the first meeting of the 'Big Three.' From Left - Soviet leader Josef Stalin, U.S. President Franklin D. Roosevelt and British Prime Minister Winston Churchill. Topics during the four day conference included - Confirmation of the decision to invade Western Europe in the Spring of 1944 - Plans for the invasion of Southern France - And a promise by Stalin to join in the war against Japan when Germany was defeated. (Photo credit: U.S. Signal Corps., courtesy Library of Congress)