ALAMEDA, Calif. -- Admiral Thad Allen, Commandant of the Coast Guard, talks about self-propelled semi-submersible drug trafficking vessels while aboard the Coast Guard Cutter Boutwell Jan. 10, 2009, prior to the Boutwell departing on a 5-month multi-mission tour around the world. The Coast Guard has been involved in three separate cases involving semi-submersible vessels since Dec. 31, 2008. U.S. Coast Guard video by petty Officer David Marin.
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