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Nike's sub-two-hour marathon shoe doesn't look the way you think it should - Canadian Running Magazine
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A sub-two-hour marathon, once seen as 'impossible,' could happen much sooner than experts thought - The Washington Post
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Nike's sub-two-hour marathon shoe doesn't look the way you think it should - Canadian Running Magazine
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Athletes attempt to break two-hour marathon barrier wearing custom-engineered Nike trainers - YouTube
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