16x9 - Death Race: Inside the Spartan Death Race challenge

It's unlike any athletic competition you've seen before. Four days of agonizing pain, over a dozen challenges, no sleep and a course that is more than 80 kilometers long. It's called the Spartan Death Race. And for months, 16x9 followed three Canadians as they trained to compete -- both physically and emotionally -- in the race. Antony Robart reports.