“HELLO?!" President Kennedy calls Colonel John H. Glenn,Jr aboard the USS Noa. In the audio, you can hear JFK congratulating Colonel Glenn on the successful completion of the Mercury-Atlas 6 test flight (also known as Friendship 7), or during which he became the fifth person in space and the first American to orbit the Earth.
We consider the exchange is pretty amusing.
See information here:http://www.jfklibrary.org/Asset-Viewer/Archives/JFKWHA-075-002.aspx
Source: tumblr.com