Eisenhower, commonly known as 'Ike' (3 letters), was the 34th President of the United States from 1953 to 1961. He was a five-star general in the United States Army during World War II and served as Supreme Commander of the Allied Forces in Europe. His wife, Mamie (5 letters), was First Lady of the United States from 1953 to 1961. During his presidency, Eisenhower launched the Atoms for Peace program and authorized the launch of the first nuclear-powered submarine, the USS Nautilus (3 letters).