President Franklin D. Roosevelt used the yacht more frequently, with over fifty recorded outings between 1933 and 1935. On March 25, 1933, what was now known simply as Sequoia and no longer Sequoia II, became the official presidential yacht after it was transferred from the Department of Commerce to the Naval Department. An elevator was installed to enable access for the polio-stricken President, who, like Hoover before him, enjoyed fishing aboard Sequoia and also used the vessel for important meetings and summits. On April 23, 1933, President Roosevelt hosted British Prime Minister James Ramsay MacDonald as his first guest on the Sequoia. During a cruise to Mount Vernon they discussed the Great Depression, demilitarization, Adolf Hitler's rise and strategies for averting the threat of a potential new war with Germany. As it became clear these efforts were failing and war approached, the wooden Sequoia was deemed unsafe for the President, and on December 9, 1935, Sequoia was officially reassigned to the Secretary of the Navy and the steel-hulled was designated as the presidential yacht. For the next three decades, Sequoia served at the pleasure of the United States Secretary of the Navy until its recommissioning in 1969 as a presidential yacht. Truman Administration While serving as the yacht for the Secretary of the Navy, U.S. presidents and members of the Cabinet continued to use the Sequoia, often providing the backdrop for critical moments in American history. President Harry S. Truman who used the as his official yacht, nevertheless called upon Sequoia to host the first atomic arms control talks. Just three months after the dropping of atomic bombs on Hiroshima and Nagasaki, it was aboard the Sequoia during a November 1945 cruise down the Potomac past Mount Vernon that Truman first discussed the promise of atomic power and the need to control atomic weapons with the United States' closest allied leaders, Prime Ministers Clement Attlee of Great Britain and Mackenzie King of Canada. On September 16, 1946, then General Dwight David Eisenhower's calendar shows he met aboard the Sequoia with U.S. Fleet Admiral Chester W. Nimitz, General Carl Spaatz, and British Field Marshal Bernard Law Montgomery. This meeting, under the guise of a cruise to Mount Vernon, initiated a series of highly classified political and military discussions from which emerged the Western European Union, which formed in 1948, followed by NATO a year later. General Eisenhower later served from 1951