From September 1948 to January 1949, Roosevelt undertook a second tour of duty with U.S. Naval Forces, Mediterranean. In 1950, Roosevelt became the first carrier to take nuclear weapons to sea. In September and October 1952, she participated in Operation Mainbrace, the first major NATO exercise in the North Atlantic. Roosevelt operated with other major fleet units, including the aircraft carriers , , and , as well as the battleships and .
