Armored vehicles have come a long way since President Roosevelt rode in Al Capone's old car at the beginning of World War II.

Clint Hill, the US secret service agent who leapt onto the back of John ... and was riding on the left running board of the follow-up car directly behind the presidential limousine as it made ...

Secret Service agent Clint Hill hurled himself atop President John F. Kennedy’s uncovered limousine when Lee Harvey Oswald ...

(AP) — Clint Hill, the Secret Service agent who leaped onto the back of President ... and was riding on the left running board of the follow-up car directly behind the presidential limousine ...

If you think car prices are bad ... of "Jay Leno's Garage," talked about the presidential limo with Secret Service agents Jay Nasworthy and Steve Abel, who shared insights and stories about ...