Rivals Manny Pacquiao and Juan Manuel Marquez hit New York City on the second leg of their media tour, as the fighters announce their fourth showdown on December 8th at the MGM Grand in Las Vegas. The event will be carried by HBO Pay-Per-View and promoted by Top Rank, Zanfer Promotions, MP Promotions and Marquez Promotions. Photos by Ed Diller/Top Rank.