The next generation of "American Ninja Warrior" begins, as some of the show's biggest fans now get an opportunity to compete for the chance to be named American Ninja Warrior junior champion.

The next generation of "American Ninja Warrior" begins, as some of the show's biggest fans now get an opportunity to compete for the chance to be named American Ninja Warrior junior champion.

The next generation of "American Ninja Warrior" begins, as some of the show's biggest fans now get an opportunity to compete for the chance to be named American Ninja Warrior junior champion.