Al-Qaeda terrorism wins hands down in any competition for deciding who attacked New York City and Washington D.C. on September 11, 2001. Much of the speculation is pointless and ill-conceived.
Some Americans, albeit a relatively small minority, believe that the attacks of September 11, 2011, were not the result of foreign terrorists but the work of persons in American government, a serious charge. That government-origin idea is here addressed.
Q: Why does it look like there was a controlled demolition on one or both towers?
A: What difference does it make? Not everyone thinks it looks that way. What would anyone expect from a fueled airliner colliding with a skyscraper? A balloon pop? The Federal government has no need to destroy thousands of American lives through demolitions; they have the Internal Revenue Service.
Q: What about rumors that residue of explosives was found at the World Trade Center site?
A: What about the 1993 bombing by mostly-foreign-born terrorists: an attack on the basement of the World Trade Center? Who would be the more likely suspects in an attack just eight years later? Foreign-born terrorists win hands down against the U. S. Government, regardless of rumors about residues.
Q: What about the idea that a missile hit the Pentagon, not an airliner?
A: Eyewitnesses said it was an airliner. Nobody saw any missile hit the Pentagon. Case closed.