I've been browsing through some of the audio assets stored in the JFK Digital Archive. Erica Boudreau, Archivist at the Library, directed me towards this interesting conversation between President Kennedy and United States Astronaut Gordon Cooper, immediately after the recovery of Faith 7 on May 16, 1963.
The audio reflects the importance of the space program to President Kennedy, who had made the following statement earlier in the decade:
I believe that this nation should commit itself to achieving the goal, before this decade is out, of landing a man on the moon and returning him safely to earth.
Major Cooper manned the Faith 7 on a 600,000 mile journey before his safe landing and recovery by the USS Kearsarge. In the following brief conversation, President Kennedy displays his Boston accent (Mayj-ah Coop-ah) to congratulate him and welcome him back to earth.
The location of this audio file in the digital archive can be found here:
For a slightly longer audio file, be sure to listen to President Kennedy's conversation with Dwight Eisenhower (JFK's predecessor) regarding the use of a naval blockade to resolve the conflict between Russia and the United States (the Cuban Missile Crisis). Considering what was at stake (nuclear war), this conversation is priceless history.
More detail on the technology behind the digital archive can be found here.