John Fitzgerald Kennedy (May 29, 1917 - November 22, 1963), commonly known as "Jack" or by his initials JFK, was the 35th President of the United States, serving from January 1961 until he was assassinated in November 1963. After military service as commander of Motor Torpedo Boats PT-109 and PT-59 during World War II in the South Pacific, Kennedy represented Massachusetts' 11th congressional district in the U.S. House of Representatives from 1947 to 1953 as a Democrat. Thereafter, he served in the U.S. Senate from 1953 until 1960. Kennedy defeated Vice President and Republican candidate Richard Nixon in the 1960 U.S. presidential election. At age 43, he was the youngest to have been elected to the office, the second-youngest president (after Theodore Roosevelt), and the first person born in the 20th century to serve as president. To date, Kennedy has been the only Catholic president and the only president to have won a Pulitzer Prize. Events during his presidency included the Bay of Pigs Invasion, the Cuban Missile Crisis, the Space Race-by initiating Project Apollo (which would culminate in the moon landing), the building of the Berlin Wall, the African-American Civil Rights Movement, and increased U.S. involvement in the Vietnam War. Kennedy was assassinated on November 22, 1963, in Dallas, Texas. Lee Harvey Oswald was accused of the crime and arrested that evening. However, Jack Ruby shot and killed Oswald two days later, before a trial could take place. The FBI and the Warren Commission officially concluded that Oswald was the lone assassin. The United States House Select Committee on Assassinations (HSCA) concluded that those investigations were flawed and that Kennedy was probably assassinated as the result of a conspiracy.