The legendary Gracie family has been one of the most dominant forces in Brazilian jiu-jitsu, and by association mixed martial arts, for decades. But it's not just the dudes in the posse that kick some ass - the gorgeous Kyra Gracie is a black belt and works as an instructor both in Brazil and the United States. She's in training to make her MMA debut later this year, and I pity the poor lady who stands in her way.