The MGM Grand Garden Arena in Las Vegas hosts this evening of UFC mixed martial arts madness that pits Gray Maynard against Frankie Edgar in a pulse-pounding bout so ferocious that both opponents won bonuses for Fight of the Night. Jiujitsu specialist Nate Diaz challenges Dong Hyun Kim in the welterweight division, while light heavyweight Brandon Vera takes on Brazilian powerhouse Thiago Silva, and Clay Guida grapples with Takanori Gomi.