Viet Cong tunnels are shored with bamboo, take right-angle turns roughly every ten yards to baffle the blast of satchel charges dropped in the mouths of the tunnels. The Viet Cong use rabbits or ...

B-52s have begun making tandem runs over Viet Cong tunnel areas, first with deep-penetration bombs that bore into the earth, then with a second wave of conventional bombs that destroy the surfaced ...