Tunnels of Vietnam
- Episode aired Nov 13, 2002
- TV-PG
- 46m
Journey beneath the earth to see why the construction of tunnels remains among the most difficult and dangerous engineering projects man can undertake.Journey beneath the earth to see why the construction of tunnels remains among the most difficult and dangerous engineering projects man can undertake.Journey beneath the earth to see why the construction of tunnels remains among the most difficult and dangerous engineering projects man can undertake.