Pandemonium broke out as boxing superstar Manny Pacquiao was formally welcomed like a rock star at the Mandalay Bay Hotel in Las Vegas Tuesday.Chants of “Manny! Manny! Manny!" broke out the moment Pacquiao stepped out of the customized passenger bus in front of the hotel lobby for the arrival rite that’s part of promotion for his showdown with Ricky Hatton.Wearing a printed polo shirt topped by a black suite to complement his black pedora hat, Pacquiao smiled for the cameras and waved to the more than 200 people that gathered outside and inside the hotel lobby.Just before him walked his mother Aling Dionisia, who experienced for the first time the kind of reception her son has been receiving here as a boxing star.Behind the star of the show followed his long-line of entourage that included...