Read the following to learn what happened at 9/11.
9/11 was a master plot, concocted by a handful of Israelis and dual passport Americans and carried out by the resources of the Mossad.
Larry Silverstein leases a nearly worthless dinosaur WTC building complex (worthless due to the asbestos the buildings were stuffed with and needed to be cleaned up, the cost of which may have rivaled the value of the buildings themselves) weeks before 9/11, makes sure it is over insured against terrorist acts and hires an Israeli security firm. From that moment on the coast is clear to let a team of demolition experts from the Israeli army led by Peer Segalovitz into the WTC buildings. These charges plus detonators had been prepared at the premises of the Urban Moving Systems company, a Mossad front. During the weeks before 9/11 these prepared charges were loaded into vans, driven into the basements of WTC Twin Towers next to the elevator shaft, unloaded into the elevator, and lifted onto the roof of the elevator through the opening in the elevator ceiling. Next the elevator moved from floor to floor while charges where being attached to the columns as displayed in this video from 0:22 onwards. The detonators of these charges were radiographic controlled and finally detonated from WTC7 on the day of 9/11.
Fast backward, Hamburg 54 Marienstrasse, july 2000, 22:40. Mohamed Atta, Al Shehhi and Jarrah (who were later blamed of being the pilots of flight 11, 175 and 93 respectively), who share the apartment hear the ringing of the door bell. Jarrah opens the door, 5 masked men make their way into the apartment with drawn pistols. The 3 Arabs are forced to lay on the ground. Their passports are confiscated, next the 3 men are made unconscious with some liquid and strangled to death afterwards. The bodies are carried out of the apartment into a van and driven off towards a desolate spot at the boarding of the Elbe river outside Hamburg, 1 kilometer north of Borstel and disposed of into the river with a bag filled with stones tied to their feet. The 3 passports are now in the possession of the agents of the Mossad, who carried out the raid on the apartment and 3 Arabs have vanished without anybody knowing that they are dead. Not long after the raid the 3 passports are given to 3 Israeli agents who were selected on having some resemblance with the 3 Arabs just killed. They make for America soon afterwards in the summer of 2000 and start laying a trail at flight schools, posing with the stolen identities from the 3 Arabs killed.
Years earlier the israeli Michael Goff working for PTech, an Arab owned software company that develops key enterprise software for many government institutions like NORAD and FAA, using his secure channel with another israeli Amit Yoran, somehow manages to give Israeli army computer programmers access to this critical computer code. It was due to this manipulation that the hijackings on 9/11 remained unnoticed by the flight controller of NORAD. Once this was in place the planes could be taken over by remote control and flown into the World Trade Center.
The hijacking of airliners by remote control had been tested as a dress rehearsal for 9/11 on the Egypt Air flight 990 that crashed into the Atlantic on October 31, 1999.