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Alex Honnold, who climbed a 1,667-foot-tall skyscraper in Taiwan on Sunday, is one of a dozen or so known skyscraper climbers worldwide.
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American rock climber Alex Honnold has climbed the Taipei 101 skyscraper without any ropes or protective equipment
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The climb drew both excitement and concern over the ethical implications of attempting such a high-risk endeavor on live broadcast.
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