www.justa11en.com It's the biggest event in mixed martial arts history, and for UFC® 100, the Ultimate Fighting Championship is bringing out the big guns. Two championships will be on the line when UFC® heavyweight title holder Brock Lesnar defends his crown against rival Frank Mir in their long-awaited grudge match, and UFC welterweight champion Georges "Rush" St-Pierre puts his belt up for grabs against Brazilian knockout artist Thiago "Pitbull" Alves. Also, The Ultimate Fighter ...