Scores of people on Thursday evening drowned when a Lebanese restaurant\'s floating deck in central Baghdad sank, according to a senior security officer.  Spokesman for the Iraqi Interior Minister Brigadier Saad Meain told KUNA that the tragedy took place when the floating deck collapsed due to overcrowding.  Iraqi divers have managed to recover the corpses of three men and two women, he said.  Rescuers are still struggling to find more corpses, he said, adding that many people could survive, but they had some wounds.