★ 0.0
★ 8.5
★ 7.2
★ 6.1
★ 6.0
★ 7.0
★ 7.3
★ 5.4
★ 4.0
★ 7.6
★ 6.5
★ 5.3
★ 1.0
★ 6.3
What caused Building 7 to collapse on 9/11? Dr. Leroy Hulsey from the University of Alaska Fairbanks may have the answer, following an exhausting four year engineering study.
