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Natalie and Tamron show 'American Grit' on military-style obstacle course

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Rorke Denver, a Navy SEAL commander and best-selling author, joins TODAY to talk about mentoring on "American Grit," a new competition show hosted by John Cena. To give viewers a taste of what the show will be like, Natalie Morales and Tamron Hall square off in a military-style obstacle course.