JACKSONVILLE, Fla. — It was one of the most dangerous jobs in Vietnam. A tunnel rat. Sam Nelson, now a 75-year-old Vietnam veteran in Jacksonville, says he didn't even know what a tunnel rat was.

For 45 years, Army veteran Nick Sanza was unable to speak about his experiences during the Vietnam War, saying his job was too dangerous and the required security clearance needed to be read in was ...

In the jungles of Vietnam, the war was not only fought on the surface but deep underground, where vast tunnel networks allowed the Viet Cong to survive overwhelming firepower. We explore how these ...

Imagine crawling your way through a seemingly never-ending series of foreign underground tunnels, armed only with a flashlight, a knife, and a small pistol. For the Vietnam War tunnel rats, these ...