Wes Hobson and Mark Allen describe the conditions and challenges associated with the grueling Iron Man triatholon.

Discover the Hurricane Hunters, who go out of their way to fly into storms. Major Eric Dutton, Major Bruce Neely, and Sergeant Chuck Cahill collect the research on hurricanes and other storms that requires them to risk their lives and their aircraft.

Join Bob Montgomery as he introduces the power ski to resident extremist Laird Hamilton.

Finally, Brian Hulse explains some of the inherent dangers to white water kayaking and how to avoid getting hurt in such an intense sport.

This video includes footage of extreme sports and interviews with the experts who live with their passions day in, day out.

Follow The Extremists as they travel the world, searching for the rush of adrenaline that comes from mastering the natural world. From white water rafting to mountain climbing and hang gliding, each new adventure brings a better understanding of human limitations, or the lack thereof.