Fascinating documentary of the NY skyscraper that almost came down. A design flaw in the Citygroup Center was discovered that would mean in a certain speed of wind (with odds of every 16 years) it would all come down. Not just come down but fall to the side, creating a domino effect on nearby buildings. It all began with an architecture student calling the building designer revealing the flaw. An amazing story of catastrophe averted, right under the public’s nose with no publicity of the danger. Worth the watch.