from OffG on Youtube
this is a playlist of three videos, to access all of them click on the upper left tab
David Chandler, physics teacher and member of AE9/11 Truth describes the journey toward NIST’s public admission that their initial calculations were incorrect and that WTC7’s first eight floors did descend at free-fall speed.
This concession by NIST (see section 11) raises many additional questions about the plausibility of the fire-induced progressive failure explanation for WTC7’s collapse that NIST published in 2008.
In light of some of the disruptive and time-wasting commentary on these science-based 9/11 threads, we are asking everyone who makes claims of fact to post links or sources, be courteous, and stay on topic. Thanks….