Grappling and submission, joint-locks and chokes. The perfect weak spot to jab, the perfect placing of the arms around their opponent’s neck to cause a tap out. Just a few things jiu-jitsu members ...

Julio César Fernandez Nunes has traded kicks, leg locks and choke holds with some of the world’s fiercest Brazilian jiu-jitsu fighters. But on a steamy afternoon in his Williston gym, the 65-year-old ...