Sunday, May 19, 2013
911
When the American Airlines boeing 767 crashed into the north tower it left a gaping, burning hole near the 80th floor of the 110 story skyscraper. 18 minutes later the second Boeing 767- Untied Airlines Flight 175 sharply turned to the 2nd tower and sliced into the 60th floor. The structural steel of the skyscraper, built to withstand winds in excess of 200 miles per hour and a large conventional fire, could not withstand the tremendous heat generated by the burning jet fuel. At 10:30 a.m., the other Trade Center tower collapsed.
http://www.history.com/topics/9-11-attacks
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