The official version from Wikipedia concerning the 9/11/2001 event is as follows:

Early on the morning of September 11, 2001, 19 hijackers took control of four commercial airliners (two Boeing 757s and two Boeing 767s) en route to California (three of them headed to LAX in Los Angeles and one to SFO in San Francisco) after takeoffs from Logan International Airport in Boston, Massachusetts; Newark Liberty International Airport in Newark, New Jersey; and Washington Dulles International Airport in Loudoun and Fairfax counties in Virginia. Large planes with long coast-to-coast flights were selected for hijacking because they would have more fuel.

The four flights were:

• American Airlines Flight 11: a Boeing 767 aircraft, departed Logan Airport at 7:59 a.m. en route to Los Angeles with a crew of 11 and 76 passengers, not including five hijackers. The hijackers flew the plane into the northern façade of the North Tower of the World Trade Center in New York City at 8:46 a.m.
• United Airlines Flight 175: a Boeing 767 aircraft, departed Logan Airport at 8:14 a.m. en route to Los Angeles with a crew of nine and 51 passengers, not including five hijackers. The hijackers flew the plane into the southern façade of the South Tower of the World Trade Center in New York City at 9:03 a.m.^[f]
• American Airlines Flight 77: a Boeing 757 aircraft, departed Washington Dulles International Airport at 8:20 a.m. en route to Los Angeles with a crew of six and 53 passengers, not including five hijackers. The hijackers flew the plane into the western façade of the Pentagon in Arlington County, Virginia, at 9:37 a.m.
• United Airlines Flight 93: a Boeing 757 aircraft, departed Newark International Airport at 8:42 a.m. en route to San Francisco, with a crew of seven and 33 passengers, not including four hijackers. As passengers attempted to subdue the hijackers, the aircraft crashed into a field in Stonycreek Township, Pennsylvania, near Shanksville, at 10:03 a.m.

The most prominent conspiracy theories can be broadly divided into three main forms:

• LIHOP (“Let it happen on purpose”) – suggests that key individuals within the government had at least some foreknowledge of the attacks and deliberately ignored it or actively weakened United States’ defenses to ensure the hijacked flights were not intercepted.  Similar allegations were made about Pearl Harbor.
• MIHOP (“Make/Made it happen on purpose”) – that key individuals within the government planned the attacks and collaborated with, or framed, al-Qaeda in carrying them out. There is a range of opinions about how this might have been achieved.
• Others – who reject the accepted account of the September 11 attacks are not proposing specific theories, but try to demonstrate that the U.S. government’s account of the events is wrong. This, according to them, would lead to a general call for a new official investigation into the events of September 11, 2001. According to Jonathan Kay, managing editor for comment at the Canadian newspaper National Post^[and author of the Among the Truthers: A Journey Through America’s Growing Conspiracist Underground, “They feel their job is to show everybody that the official theory of 9/11 is wrong. And then, when everybody is convinced, then the population will rise up and demand a new investigation with government resources, and that investigation will tell us what actually happened.”

1.  ENGLISH  THE MYSTERIES OF 9/11/2001 FOOD FOR THOUGHT

On May 30, 2017 CEO NGUYEN XUAN NAM published

Nguyễn Kinh Doanh: Vẫn còn đó những vấn đề bí ẩn! – YouTube

  https://www.youtube.com/watch?v=kaOc6O8oGz0&t=1990s
In the interview, I stated very clearly about my research.  Many questions were answered.  Today, most people in the US accept the official version of the event and deny “conspiracy theories”.
In the 2022 internet, fallacies of 9/11 have been erased.
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