ARCHITECTS AND ENGINEERS FOR 9/11 TRUTH looks at three anomalous events that occurred at the World Trade Center Towers in the months and weeks immediately preceding the attacks:

There was an increase in security at the Trade Center in the two weeks before 9/11, for reasons that are unclear, which only ended the day before the attacks. Also, the fire alarm system in World Trade Center Building 7 was placed on “test condition” every morning in the seven days before the attacks and on the day of 9/11. While it was in this mode, any alarms would be ignored. WTC 7 was a massive skyscraper located just north of the Twin Towers, which mysteriously collapsed late in the afternoon of September 11. And some of the elevators in the Twin Towers were out of service in the months before the attacks, supposedly due to maintenance work or modernization.

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