SAN ANTONIO -

Nov. 22 will mark the 50th anniversary of President John F. Kennedy’s assassination in Dallas. 

Just one day before his death, Kennedy stopped and made one of his last speeches at what was then Brooks Air Force Base in San Antonio.

"There he (was), big as life: the President of the United States. This man was Camelot,” recalled Philip Jameson. 

Jameson, an 18-year-old then assigned to Brooks, remembered his encounter with the famous president like it was yesterday.

"I've been waiting for 50 years to tell somebody about this,” said Jameson, who now resides in Florida.

Jameson is back in San Antonio to do just that. 

Filmmakers spent Tuesday at Brooks City Base documenting President Kennedy’s last 24 hours, part of which were spent in San Antonio. The crew is creating a two-hour documentary for the National Geographic Channel. 

Producer Robert Erickson wanted to stray away from a documentary that focused on the President’s assassination.

"So we thought we'd do a different take for National Geographic, something that celebrated the legacy of Kennedy, the man, to see his character unveiled,” said Robert Erickson, Producer of “JFK: the Final 24 Hours."

The documentary will also include an account from Dr. Billy Welch, a San Antonian who worked at Brooks Air Force Base at the time of President Kennedy’s visit. 

The President took an unscheduled tour of the base after his speech, where Welch showed him and the First Lady a hypobaric chamber.  A revolutionary experiment inside the chamber was underway for the nation’s space program.

The hypobaric chamber has not been moved, and served as the backdrop for the documentary’s interviews.  A window in the hypobaric chamber is still known as the “Kennedy window” because it is where he stopped to talk to four men inside of the chamber who were part of the experiment. 

One of the men inside was 18-year-old Philip Jameson.

“The minute he walked around the corner and that Boston accent came out, it was like, there he is, now we’re talking,” recalled Jameson.

President Kennedy then passed along a compliment, using his famous adage.

“He told me, you are the perfect model of, 'Ask not what your country can do for you, but what you can do for your country,'” said Jameson.

Sadly, 21 hours later, President Kennedy would be assassinated. 

But, it is the personal interactions just before his death the documentary hopes to highlight.

The-two hour documentary is set to air in November on the National Geographic channel.

For a list of recent stories Justin Horne has done, click here.