There has been much skepticism about the ability of the purported 9/11 hijackers to carry out the flying required to hit their targets successfully. Who actually did the flying involved and were all the original passengers still on board when they crashed?

The pilots were not the hijackers identified by name. They were others who were clandestine operatives on board each of the aircraft intentionally, to provide the expertise needed for the actual flying involved. This was an orchestration with alien involvement from first to last, and the planes were indeed remotely controlled to make their final approaches and then crash into the buildings. The people on board the aircraft were removed through a trans-dimensional extraction, as used with alien abductions, and was done while the craft were airborne. And so the humans were removed, and some were repurposed, and others were eliminated, but the actual planes crashing into the buildings contained no human beings.