July 18, 2008 6:01 PM

At $2 million each, subs become the drug transport of choice

Semi-submersible submarines have become drug traffickers' preferred method of bringing cocaine to the United States, accounting now for 32 percent of all maritime shipments of the drug. Built in the rivers of Colombia under the jungle canopy, they ply the waters between South America and the United States. On Friday, a drug-laden sub, captured by Mexico, was towed into port. The tip came from the United States, Homeland Security Secretary Michael Chertoff said.

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