False flag terrorism refers to acts of terror or terrorist operations that are carried out by one group (A) and blamed on another group (B), usually for the purpose of justifying a revenge attack on group B or to justify the need to give up freedoms in exchange for safety.
For example, just before the US went full on into war with Vietnam, America claimed that the North Vietnamese had attacked a US ship in the Gulf of Tonkin. The US later admitted that the whole incident had never happened. Nevertheless, this was the main excuse used by the US to justify going to war with Vietnam, destroying the country and murdering millions of people. I use the word, murder because that’s what it was and that is what false flag operations often do - they kill people (of group A) and then blame it on the people (of group B) in order justify going to war with group ‘B’ in retaliation for the terrorism that group A's government had actually carried out on its own people. As for 9/11, it was definitely false flag terrorism - carried out by organizations within the US government, private industry within the US as well as some foreign governments and their intelligence agencies.
According to the official story, Osama Bin Laden and a group of his followers that used to live in caves in Afghanistan, traveled to the US, learned how to fly very small airplanes, bought passenger tickets for very large airplanes, took control of the airplanes and crashed them into World Trade center tower # 1, WTC tower # 2 and the Pentagon. According to the US government, the fires in the towers (caused by jet fuel) melted melted the steel frames of the buildings and caused the structures to collapse. This explanation is incorrect due to the fact that, while the maximum temperature that jet fuel burns at is 825 C, steel needs to be at least 1510 degrees Celsius before it melts. By the way, tower # 7 also collapsed even though nothing hit it. This one was a little more difficult to explain, so the government just kind of ignored it in its report.
For a long time, the majority of people just seemed to accept the official story because that’s what mainstream the media (MSM), like CNN, ABC, BBC, etc., kept pushing. However, as more people got on the internet and shared ideas, more people began to question the official story. It was very difficult at first to question the government story, because everybody knew that if the government had lied to us about 9/11, they had probably lied to us about a lot of other terrible things, too. How many wars were justified by false flag events; how many wars have been fought under false pretenses? Everyone knows deep down inside that, if our own government, the CIA and others had carried out 9/11, surely there must be many more lies that we have yet to uncover. This is why so many people still insist on believing their governments and the mainstream media. If they allow themselves to learn the truth, it could destroy their whole illusion of reality and many people just don’t want to deal with that; thus, they will hold onto the lie.
As for what really happened with 9/11. I think was ordered by the the elite owners of the central banks in order to justify going to war with Afghanistan (in order to control the heroin), Iraq in order to steal their oil, Libya (again for the oil) and so on as part of their plan to control the world and institute a world government with them as masters/gods. Furthermore, I am believe that most of the highest levels of the us government were either involved or at least aware of what was happening. Saudi Arabia provided the funding and the Israeli MOSSAD and CIA carried out the operation. Humanity needs to wake up and take responsibility before it’s too late.