Mr Kennedy's 1961 letter was addressed to an eight-year-old girl, who wrote to the president about her concerns that the Russians would kill Santa if they tested a nuclear bomb at the North Pole. "At USDA, we want to ensure we are not hindering Mr. Claus' important work of spreading Christmas Cheer for all to hear".
Instead of reaching Santa, the phone number put kids through to NORAD.
For years, the USA military is viewing Santa Claus' tour live every December 24.
Meanwhile, on Twitter, the North American Aerospace Defense Command (NORAD) has remained vigilant in updating everyone on Santa's whereabouts as he flies around the globe.
Thus a tradition was born that rolled over to NORAD when it was formed in 1958. Or that Santa Claus weighs 260 pounds at the start of his flight, but by the time he lands he weighs 1,260 pounds? Each year since, NORAD has reported Santa's location on December 24 to millions of children and families.
It can also read Christmas stories for the young ones, with videos and written stories to follow along with on the Santa's Village mini-site.
Today, about 1,500 volunteers take emails and telephone calls to 1-877-HI-NORAD, or 1-877-446-6723.
Most early calls come from Japan and Europe, the Associated Press reports.
This year marks the 64th anniversary of NORAD tracking Mr. Claus and his team of all-female (yep, that's right!) reindeer. "After that he shoots up to Japan, over to Asia, across to Africa, then onto Western Europe, Canada, the United States, Mexico and Central and South America".
Maj. Andrew Hennessy from the Canadian Armed Forces told CTV News Channel on Tuesday he's proud that "technology we use to keep our country safe" is also helping guide Santa. Callers from Britain ask about Father Christmas. But when it comes to first-time this season, it obtained excellent help make sure that the circulation of presents moved effortlessly: compared to the astronauts regarding the International Space Station.