Watch UFC 170 Q&A video stream with Travis Browne and Luke Rockhold live online today (Feb. 21) from Las Vegas

Ultimate Fighting Championship (UFC) is kicking off the UFC 170: "Rousey vs. McMann" weigh in event this afternoon (Feb. 21, 2014) inside Mandalay Bay Events Center in Las Vegas, Nevada, by having top heavyweight contender Travis Browne -- along with 185-pound title chaser Luke Rockhold -- emcee the promotion's "Fight Club" question and answer (Q&A) session from "Sin City." And you can watch "Hapa" and "L-Rock" live, right here at MMAmania.com, with the video stream starting at 5 p.m. ET in the video player above.