President Franklin D. Roosevelt and Prime Minister Winston Churchill give a joint press conference 

In this black and white photograph, Prime Minister Winston Churchill and President Franklin D. Roosevelt give a joint press conference in the Oval Office of the White House, December 23, 1941. Churchill's visit came in the aftermath of the attack on Pearl Harbor and the United States formally entering World War II earlier that month. The Prime Minister would go on to make numerous visits to Washington throughout the conflict.