This video has firefighters and other people saying that they heard explosions going off while they were in the towers way before they came down.
You seem to be belittling "9/11 truthers"
The explosive noises would have been covered up by the sound of the towers falling.
Have you looked at any of the evidence that the 'truthers' base their claims on? If not then how can you come to that conclusion?
Edit to add that my comment is for The Other Maven.

not from Iraq, as mysterious government source(s) supposedly leaked to ABC News.

The case of some U.S. government employee (whether it was Bruce Ivins, the FBI-targeted suspect who committed suicide, or not) using U.S. government anthrax qualifies as an “inside job” to me.

https://www.salon.com/2008/08/01/anthrax_2/

The 2001 anthrax attacks remain one of the great mysteries of the post-9/11 era. After 9/11 itself, the anthrax attacks were probably the most consequential event of the Bush presidency. One could make a persuasive case that they were actually more consequential. The 9/11 attacks were obviously traumatic for the country, but in the absence of the anthrax attacks, 9/11 could easily have been perceived as a single, isolated event. It was really the anthrax letters — with the first one sent on September 18, just one week after 9/11 — that severely ratcheted up the fear levels and created the climate that would dominate in this country for the next several years after. It was anthrax — sent directly into the heart of the country’s elite political and media institutions, to then-Senate Majority Leader Tom Daschle (D-SD), Sen. Pat Leahy (D-Vt), NBC News anchor Tom Brokaw, and other leading media outlets — that created the impression that social order itself was genuinely threatened by Islamic radicalism.

If the now-deceased Ivins really was the culprit behind the attacks, then that means that the anthrax came from a U.S. Government lab, sent by a top U.S. Army scientist at Ft. Detrick. Without resort to any speculation or inferences at all, it is hard to overstate the significance of that fact. From the beginning, there was a clear intent on the part of the anthrax attacker to create a link between the anthrax attacks and both Islamic radicals and the 9/11 attacks. This was the letter sent to Brokaw:

09-11-01
This is next
Take Penacilin Now
Death to America
Death to Israel
Allah is great

The letter sent to Leahy contained this message:

We have anthrax.
You die now.
Are you afraid?
Death to America.
Death to Israel.
Allah is great.

By design, those attacks put the American population into a state of intense fear of Islamic terrorism, far more than the 9/11 attacks alone could have accomplished.

Much more important than the general attempt to link the anthrax to Islamic terrorists, there was a specific intent — indispensably aided by ABC News — to link the anthrax attacks to Iraq and Saddam Hussein.