Caleb Bergstrom is the one to beat this season on American Ninja Warrior. Pic credit: NBC Caleb Bergstrom is one to watch on American Ninja Warrior as he works his way closer to the $1 million prize.
How do I set up an obstacle course in my backyard? Ninja warrior may have started as an obscure Japanese tournament, but it has exploded into mainstream Western culture with television shows based on ...
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