Shipping containers full of illegal drugs have been discovered and seized by federal authorities at a Philadelphia port in what federal authorities describe as the largest drug seizure in the region's history. Six people have now been charged in the $1 billion cocaine bust. A senior law enforcement official said more than 15,500 kilos of cocaine were found in seven containers, which were found aboard a cargo ship, the MSC Gayane, that previously stopped in Colombia, Chile, Panama and the Bahamas. The bust occurred at the Packer Avenue Marine Terminal Port on the Delaware River in South Philadelphia.