Dalton Knapp who was diagnosed with a rare and aggressive form of leukemia at a young age will now try to conquer 'American Ninja Warrior' tonight. 

Knapp has been cancer free for 10 years and I'm excited to see him tackle this obstacle course. The episode airs tonight at 7 p.m. on NBC  and will also include runs by his brother, Drew Knapp, and friend Luke Jameson Chambers. We wish the best of luck to all three of them and we will definitely be watching and cheering them on tonight!