Tricky Ways to Pull Down a Skyscraper – NYTimes.com

http://www.nytimes.com/2013/06/18/science/tricky-ways-to-pull-down-a-skyscraper.html?src=un&feedurl=http%3A%2F%2Fjson8.nytimes.com%2Fpages%2Fscience%2Findex.jsonp&pagewanted=all

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