Aircraft carrier technology underwent many changes during the Cold War. The first of the 45,000-ton carriers, was commissioned eight days after the end of World War II, on September 10. A larger ship was planned, and in 1948, President Harry Truman approved the construction of a "supercarrier", a 65,000-ton aircraft carrier to be named ; however, the project was canceled in April 1949 by the Secretary of Defense. The Navy's first supercarriers came later, in 1955, with the . 1953 saw the first test of an angled-deck carrier, .