Salvage workers will attempt to raise Italy\'s Costa Concordia cruise ship on Monday, weather permitting, in an unprecedented $1.0-billion (752-million euro) operation, officials said. \"If weather conditions allow, the operation will start at 6:00 am (0400) GMT on September 16... This is an operation that has never been attempted before,\" Franco Gabrielli, head of the civil protection agency which is overseeing the operation, said on Thursday.