At 5:20 in the afternoon on 9/11, Building 7 of the World Trade Center collapsed, even though it had not been struck by a plane and had fires on only a few floors. The reason for its collapse was considered a mystery. In August 2008, NIST (the National Institute of Standards and Technology) issued its report on WTC 7, declaring that "the reason for the collapse of World Trade Center 7 is no longer a mystery" and that "science is really behind what we have said." Showing that neither of these claims is true, David Ray Griffin demonstrates that NIST is guilty of the most serious types of scientific fraud: fabricating, falsifying, and ignoring evidence. He also shows that NIST's report left intact the central mystery: How could a building damaged by fire—not explosives—have come down in free fall?