To the Viet Cong, a shovel is as important as a rifle. Steadily increasing pressure from American ground and air power has literally pushed the Reds underground, and in the past few years they have ...

Add Yahoo as a preferred source to see more of our stories on Google. A Vietnamese tour guide shows visitors in Cu Chi how Vietcong fighters hid in holes in the ground. The tunnel system, more than ...

If there is any one lesson from America’s first lost war — the Vietnam War — it is that tunnels can play a pivotal role. That lesson informs today’s war between Israel and Hamas in the Gaza Strip and ...