Hardly an expert as she is a geneticist and not an explosives expert. So strike the theory as being some daft bats 5 minutes of fame.
she has great understanding of scientific method
YouTube
Have you ever seen an explosives expert bring a building straight down, the timing on the explosions need to be exact to the microsecond. Impossible to achieve with the det cord available today as two pieces from the same drum the same length will differ by a few microseconds. The explosions were caused by the valence bonds in the steel beams giving way and causing the building to implode around its central core. Heat steel to 1000 c and it starts to alter chemically, the carbon moves away from the heat source while the ferrite moves towards the heat source. This makes the steel turn into first wrought iron and then cast iron, and as everyone knows cast iron is very weak when struck
NISTs forensic testing of wtc steel showed no signs of the temperatures sufficient to weaken steel
Strange that as the temperatures are quite low, and the steel I saw showed all the classic sings of valence bonds being compromised. The biggest problem was the dirty steel used that already weakened the beams, and the design that used just enough steel support to meet code requirements. One of the biggest failings of US builders