@sneakypete
I’ve always wondered...why didn’t we just C4 it or flamethrower it and not bother going in? Honest question.
@Axeslingerer
Because you never knew what was in the tunnel,or how big it was inside,until you went in. There were who hospitals build inside mountains,as well as supply depots.
There might be an enemy area command inside,and the documents and maps you could retrieve would be almost beyond value.
Not to mention captured US POW's.
Something like a flamethrower burst would have about as much effect as lighting a match in a football stadium.
You might think you have done something and move on,only to have the enemy emerging from the tunnel and coming at you from behind.