As seen in this revealing photo the Twin Towers' destruction exhibited all the characteristics of destruction by explosions:

Extremely rapid onset of “collapse”

Sounds of explosions at plane impact zone — a full second prior to collapse (heard by 118 first responders as well as by media reporters)

Observations of flashes (seen by numerous professionals)

Squibs, or “mistimed” explosions, 40 floors below the “collapsing” building seen in all the videos

Mid-air pulverization of all the 90,000 tons of concrete and steel decking, filing cabinets & 1000 people – mostly to dust

Massive volume of expanding pyroclastic dust clouds

Vertical progression of full building perimeter demolition waves

Symmetrical collapse – through the path of greatest resistance – at free-fall speed — the columns gave no resistance

1,400 foot diameter field of equally distributed debris – outside of building footprint

Blast waves blew out windows in buildings 400 feet away

Lateral ejection of thousands of individual 20 - 50 ton steel beams up to 500 feet

Total destruction of the building down to individual structural steel elements – obliterating the steel core structure.

Tons of molten Metal found by FDNY under all 3 high-rises (no other possible source other than an incendiary cutting charge such as Thermate)

Chemical signature of Thermate (high tech incendiary) found in slag, solidified molten metal, and dust samples by Physics professor Steven Jones, PhD.

FEMA finds rapid oxidation and intergranular melting on structural steel samples

More than 1000 Bodies are unaccounted for — 700 tiny bone fragments found on top of nearby buildings

And exhibited none of the characteristics of destruction by fire, i.e.

Slow onset with large visible deformations

Asymmetrical collapse which follows the path of least resistance (laws of conservation of momentum would cause a falling, intact, from the point of plane impact, to the side most damaged by the fires)

Evidence of fire temperatures capable of softening steel

High-rise buildings with much larger, hotter, and longer lasting fires have never “collapsed”