Ronda Rousey made quick work of Gina Carano in their highly anticipated mixed martial arts fight, forcing her tap out in just 17 seconds. Rousey returned to the Octagon at L.A.'s Inuit Dome Saturday night after a nearly 10-year hiatus and came storming out of the gate in the first round, tackling Carano to the canvas.  The MMA star then put Carano in her signature armbar, and that was it, folks. Carano immediately tapped out. After the match, Rousey said she's headed back into retirement to be