In this presentation it is explained in detail how US Government officials used three underground thermo-nuclear explosions to demolish three buildings of the World Trade Center in New York during the 9/11 events: the WTC Twin Towers and the WTC building #7. In addition, it is explained why the US Government was obliged to demolish these buildings. It is claimed here that the US Government has actually three levels of 9/11 "truths". One "truth" -- for consumption by the general public (i.e. a version expressed by the 9/11 Commission Report. Another -- an "awful" and "confidential" one -- for exclusive consumption by middle-ranking officials. And the third one -- the real truth, which is known only to high-ranking US- officials and to some foreign dignitaries, to whom it was confided by the US authorities. It is explained that the Pentagon was struck not by a passenger plane -- American Airlines Flight 77 -- as claimed by a "public" version of the 9/11 "truth", but by a certain nuclear-tipped supersonic cruise missile which was later found unexploded in the middle of the Pentagon. The US officials were handed information (apparently by some "friendly" secret services) that two more similar nuclear warheads were allegedly planted by a third party in the upper floors of the WTC Twin Towers. The responsible US officials had no choice than to believe that claim, because an unexploded 500 kiloton nuclear warhead found in the Pentagon was a tough means to convince them. Therefore the US officials feared that the entire city of New York could be destroyed by a powerful nuclear airburst if they did not react promptly. It was decided to collapse the WTC Twin Towers by their in-built demolition feature that was, in turn, based on nuclear demolition charges positioned at 77 meters below the earth's surface under each Tower. Upon exploding deep underground these nuclear demolition charges produced powerful "crushing waves" that were directed upwards and pulverized the entire Towers' bodies up to 300-350 meters, which caused the Towers to collapse in a very strange manner that was shown on all contemporary 9/11 TV footage.
