Kaillie Humphries: What does it take to reach greatness?

This 30 Seconds to Greatness Series features Olympians or Olympic Hopefuls telling Canada how they overcame obstacles and reached greatness in 30 seconds (or less).  Kaillie Humphries won gold in 2010 and is training hard for Sochi 2014.  With her passion and heart, she tells us what it takes to reach greatness.