From the University of Alaska Fairbanks – Institute of Northern Engineering… A Structural Reevaluation of the Collapse of World Trade Center 7 Project Summary This is a study of the collapse of the 47-story World Trade Center Building 7 (WTC7) at 5:20 P.M. on September 11, 2001. The objective of the study was threefold: (1) … Continue reading UAF Says WTC-7 NOT Brought Down by Fire