the empire state building. the image of the new york skyline with the empire state as kind of the central mask. >> the world trade center plan backed by among others new york governor nelson rockefeller and brother david had gathered too much momentum to be stopped. it was over seen by the port authority an agency who had a parcel of lands on the bank of the hudson river using the power of eminent doe mainly. in 1966 construction began. the excavated dirt and rock was used to extend it further into the hudson river. >> the excavation of two world record breaking towers with deep foundation. so they are excavating the creation of the world frayed center they used that excavated material to create battory park city. >> the world trade center was designed as a complex of high rise buildings with the center piece being the twin towers. when the north tower was completed in 1972 it stood 13068