James Fetzer, a former Marine Corps officer and philosophy professor who founded Scholars for 9/11 Truth, argues that the official 9/11 story is fundamentally wrong.
I never believed 9/11, because I had engineering training at GA Tech, and I could tell when a building is being blown up by explosives. Any fool can look at those films and see the buildings aren't falling down, they're blowing up.
— Paul Craig Roberts, Former Assistant Secretary of the US Treasury
His main theory is that the Twin Towers weren't brought down by plane crashes and fires, but were actually destroyed using mini or micro nuclear devices placed in the buildings' core columns. He reckons these nuclear weapons had 'dialable radii' and were directed upward to blow the towers apart from the top down, creating the appearance of a collapse whilst actually converting the buildings into fine dust.

James also argues that none of the official aircraft actually crashed on 9/11 - no planes hit the towers, the Pentagon, or crashed in Pennsylvania.
I'm saying that there's way more to 9/11 than mainstream media and our government have told us.
— Jesse Ventura, Former Governor of Minnesota
What sets him apart from other 9/11 researchers is that he doesn't just focus on how the buildings were destroyed, but also insists on addressing who was responsible and why it happened.
🎙️ Podcast episode
This episode with James includes a lot of visuals, so I’d recommend watching the video below. That said, the audio version is available on most podcast apps.