the fleet, and Joseph P. Kennedy Jr. took part in carrier operations until September, when she steamed to the coast of Norway for NATO joint maneuvers. She returned to Newport on 22 October 1957. Again in 1958 the ship sailed to the Mediterranean, and on this cruise spent April in the Persian Gulf with the Middle East Force before arriving back to Newport on 1 July 1958. After a needed period of overhaul at Boston, Joseph P. Kennedy Jr., arrived at Annapolis once more on 3 June 1959 for midshipman training. Along with other ships of the task group, she entered the St. Lawrence River and represented the Navy at the opening of the St. Lawrence Seaway on 26 June 1959. Following the ceremonies, in which both President Dwight D. Eisenhower and Queen Elizabeth II took part, the destroyer entered the Seaway and steamed to Chicago on 2 July. The ship visited various ports before returning to the Atlantic on 6 August. In 1960 she returned to the Mediterranean with and , returning to Newport on 15 October. 1961–1964 In January 1961 Joseph P. Kennedy Jr., steamed to Washington, D.C. for the inauguration of John F. Kennedy, brother of her namesake. During February and April of that year she took part in space shots in the Project Mercury series. She then arrived New York City on 1 July 1961 for a Fleet Rehabilitation and Modernization (FRAM) overhaul in the New York Naval Shipyard. During this period she received the latest in antisubmarine gear, a new helicopter flight deck and hangar aft, and numerous other modifications designed to increase her useful life. After emerging in her new dress in late May 1962, she underwent exhaustive shakedown out of Guantanamo Bay, Cuba, returning on 26 August 1962. Joseph P. Kennedy Jr., with other ships of the fleet, reacted quickly to the threat of Soviet ballistic missiles in Cuba, and President Kennedy's quarantine order. Sailing on 22 October, the ship took an active part in the blockade that forced an easing of the Cuban Missile Crisis, and on 26 October under the command of Commander Nicholas S. Mikhalevsky sent a boarding party to the Lebanese Liberty ship Marucla After participating in this graphic demonstration of the power and mobility of the US Navy, Joseph P. Kennedy Jr. remained on patrol in the Caribbean until returning to Newport on 7 December 1962. During 1963