Cause and effect of Sept 11,2001

On September 11, 2001 the United States was brought to its knees as group of terrorists successfully took down the World Trade Center. There were many factors that contributed to the collapse.
When the World Trade Center was built, a protective fire coating was sprayed on the beams used to construct the building. This coating was used so that in case of a fire, the beams would not be affected. This would keep the buildings structural integrity intact. The World Trade Center was constructed using truss construction. Truss construction is a very strong and inexpensive method of building a structure. The one downfall to truss constructio...