Six tons of cocaine—from a 32-foot-long (10-meter-long) cocaine submarine seized off Mexico's Pacific coast—sit on a Salina Cruz (map) dock in 2008. A typical cocaine sub—most of which are never discovered—can carry four to ten tons of the drug, according to former DEA official Braun. U.S. and Colombian officials estimate that about 70 new cocaine subs—carrying perhaps 400 tons of cocaine—will be launched in 2011 alone. And that's not all such ships could transport. My concern is the growing nexus between drugs and terrorism, said Braun, who added that many terrorist organizations have ties to the international drug trade. These submarines, he said, obviously could have applications other than moving drugs.