Olympian History: Dan O'Brien

HONOLULU (HawaiiNewsNow) - Mike Cherry catches up with Dan O'Brien who won gold in the grueling decathlon in 1996 Olympics. He talks about why the decathlon is widely viewed as the most grueling event in the Olympic games. He also sizes up American Ashton Eaton, who is a favorite to medal in the decathlon Wednesday. O'Brien also tells us what it's like to watch Usain Bolt in person.