By MICHAEL RUBINKAM and MATT ROURKE, Associated Press PHILADELPHIA (AP) — U.S. authorities seized 33,000 pounds, or 15,000 kilograms, of cocaine from a ship at Philadelphia's port in what they described as one of the largest drug busts in American history. They said the haul could have been worth more than $1 billion on the street. The U.S. attorney's office in Philadelphia announced the massive bust