On January 20, 1961 John F. Kennedy took the oath of office to become the 35th president of the United States. He was the youngest man elected president, as well as the 1st Catholic and the 1st to be born in the 20th century. What many consider to be the most memorable part of JFK's inaugural address is his call to Americans to commit themselves to public service: “And so, my fellow Americans: ask not what your country can do for you – ask what you can do for your country.” | JFK Library Foundat