Sixteen of North America's top fighters set personal pride and rankings aside as they climb inside the dreaded Octagon to represent their countries in one of UFC's most brutal events. Bouts include Rich Franklin vs. David Loiseau, Georges St. Pierre vs. B.J. Penn, Mark Hominick vs. Yves Edwards, Sam Stout vs. Spencer Fisher, Jason Lambert vs. Rob MacDonald, Tom Murphy vs. Icho Larenas and Nate Marquardt vs. Joe Doerksen.