The tunnel has been open over two decades. The use of tunnels by the VC as hiding places, caches for food and weapons, headquarter complexes and protection against air strikes and artillery fire was a characteristic of the Vietnam war. The tunnel has been open over two decades. In the north-western part of Massachusetts, where the mountains try to stop one from going farther, there is a great hole cut through them, called the Hoosac Tunnel. A wind tunnel is really a fairly simple device.
Most designs feature each of the five components described below.
Laurel at the turn of the century. Train service continued for another 60 years before being derailed by the automobile and severe storms in the winter of 1940. The Vietcong had been using tunnel systems for many years against the Chinese, Japanese and French invaders. There were numerous underground guerilla bases in South Vietnam that had been built and supplied by forced labor from the surrounding villages. The wind tunnels are not sorted in any order but the chronological order in which the list was assembled.