MIAMI — When Milla Bizzotto finished her first 24-hour obstacle race earlier in Miami this month, she went toe to toe with seasoned competitors, ran 36 miles and completed hundreds of obstacles.

Andy Smith, a teacher from Fishers, Indiana, will compete on the NBC reality show “American Ninja Warrior” tonight. During the school year, he teaches stage craft at Fishers High School. But he’s been watching the show since it started with his family, and his kids encouraged him to try out for it. “My kids have …read more.