While many people question the government's conclusions about 9/11, rest assured that the government agencies tasked with investigating 9/11 are confident that the government's answer to the following questions is correct:
(1) How could a rag-tag bunch of hijackers penetrate the strongest military in history and disable normal defensive procedures?
(2) How could 3 super-strong, over-engineered buildings collapse due to fire, falling at virtually free-fall speed, and exhibiting many other indications normally associated with controlled demolition?
At least the government itself is confident about the answers to these questions, right?
Well, actually: