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Few architecture students would be so bold as to point out the flaws in one of New York City’s most notable skyscrapers. But, that's exactly what Diane Hartley did in 1978, when she informed William LeMessurier, chief structural engineer of Citicorp (now Citigroup) Center, that the building was vulnerable to swaying when winds struck at its corners. After confirming Hartley's assessment and uncovering that the building had a one-in-sixteen chance of collapsing in a heavy storm, LeMessurier rallied Citicorp, the Red Cross, the NYPD, and weather organizations to initiate repairs, monitor for windstorms, and devise an evacuation plan in case of an emergency. The entire crisis was averted in secret and did not become known to the public until 1995.
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