Since we have hi-def video of a plane hitting and huge damage and fires and that the initiation started exactly where the planes hit there are no longer any rational reasons for suspecting foul play in the collapse.
Now one can still fantasize about MIHOP and LIHOP but you have to face up the the facts that there was nothing even remotely suspicious about the collapses.
The problem is that a lot of people are seemingly that afraid of MIHOP and LIHOP that they prefer to not look into a "simple natural gravity driven collapse", isn't it?
Btw, the initiation of the visible collapse of the exterior columns WTC1 started above the impact damage at floor 98.
Nevertheless, there was a lot of still unexplained bright dust/smoke on the south side below the impact zone and reaching down to the 85th floor (not further and not moving downwards) emerging at the very initial moments and followed by pretty strange dust jets from the center of floor 85N and 87W. That's the floor where the debris avalanches first became visible. That's at least very interesting, isn't it?
Well, and we have hi-def videos of the fires and the damage and so on.
There was some heavy pressure pulse at 10:18am affecting at least 5 floors and the entire width of the building. That pulse started a pretty fast fire at floor 92NE that reached the SE corner in just 10 minutes. The pulse also started a heavy fire at 95W. Any idea? May be a partial floor collapse that started fires on 92 and 95? I don't think so. May be something similar to the jets of fire from floor 13? WTC7 just 10 minutes prior to the collapse?
4 seconds in the collapse of WTC2 2 darting flames from the center of the south face of WTC1 occurred. At the same time the fire behavior completely changed. After 75 minutes burning in the SW the fire switched to the SE.
This is why the NIST theory of 3 meters catenary floor sagging in a about 20 minutes of fire and in an area without (estimated by NIST) damage to the fireproofing appears to be pretty strange.
So, there are some rational reasons in suspecting foul play in the investigation.