Declassified documents released this week on the assassination of President John F. Kennedy revealed the Social Security numbers of at least two former congressional staffers.

Christopher Pyle, 86, and Joseph diGenova, 80, had their Social Security numbers, birth dates and names shown in the documents released by the National Archives, according to ABC News.

Other Social Security numbers of other staffers were also released in the documents, but it is unclear how many of those individuals are still alive.

In January, President Donald Trump signed an executive order to release the documents about the assassination of Kennedy. 

Thousands of pages were released on the National Archives' website on Tuesday.