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Agreement for 1st Atomic Bomb is signed.
June 20, 1942 - The development of the first atomic bomb is signed into agreement between the Prime Minister of Great Britain, Winston Churchill, and President Franklin D. Roosevelt in Hyde Park, New York. -
The Jefferson Memorial
April 13, 1943 - The Jefferson Memorial in Washington, D.C. is dedicated on the 200th anniversary of Thomas Jefferson's birth by President Franklin D. Roosevelt. -
1st African American official in US State Department.
On January, 4 1944 Ralph Bunche appointed 1st African American official in US State Department. -
Yalta Conference.
February 4-11, 1945. President Roosevelt, Prime Minister Churchill, and Premier Josef Stalin hold the Yalta Conference in the Soviet Union. -
Creation of the Central Intelligence Agency, the Department of Defense, the Joint Chiefs of Staff, and the National Security Council.
July 26 Cold War: U.S. President Harry S. Truman signs the National Security Act of 1947 into law, creating the Central Intelligence Agency, the Department of Defense, the Joint Chiefs of Staff, and the National Security Council. -
Twenty-second Amendment.
February 27 1951 The Twenty-second Amendment to the United States Constitution, limiting Presidents to two terms, is ratified. -
U.S. Nuclear Submarine
June 14 1952 the keel is laid for the U.S. nuclear submarine USS Nautilus. -
Dwight D. Eisenhower became the 34th president
Dwight D. Eisenhower(R) is sworn in as the 34th President of the United States