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60 Minutes S49 E50 | Preview: King of CrossFit

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Preview: King of CrossFit

34sec
Sharyn Alfonsi profiles Greg Glassman, a brash, former gymnast who created the CrossFit workout, now the basis for a chain of gyms that has become the largest in history. Watch Alfonsi's report on Sunday, Aug. 27 at 7 p.m. ET/PT. Air Date: Aug 24, 2017
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