It isn't proof of anything to do with this present issue of Fox News.
It is proof that the NIST report is false, made up, a scientific fraud. Not only about WTC7 but also about the WTCs 1 & 2.
Denying the numerous examples of molten metal found at WTC on and after 911, only reinforces the fact that the NIST report is fraud.
The various molten metals, all with temperatures above 2,600F prove that the alleged hijackers did not, could not have caused the collapse of those three towers. The only fuel they allegedly brought was jet fuel and then office furnishings, which, also according to NIST, could not get over 1,800F.