'Heart knows no limits' as Games open

The Paralympic Games opened Wednesday with 4,350 athletes demonstrating first-hand their creed: "The heart knows no limits; everybody has a heart."

Wheelchair daredevil Aaron Wheelz showed the spirit in the opening act.

As a countdown from 10 reached its end, Wheelz raced down a giant ramp and somersaulted in the air through a giant 0 on the stadium floor. That finished the countdown and shattered more stereotypes about what athletes with disabilities can do.