The U.S. Coast Guard has released video of a so-called "narco submarine" that was recovered last month with 7.5 tons of cocaine, worth an estimated $180 million.

During a July 13 confrontation with the Coast Guard, the vessel sank. On July 26, they recovered it with the help of the Honduran Navy and FBI dive teams.

Narco submarines are responsible for nearly one-third of all cocaine in the U.S.

Watch this video from CBS News, broadcast Aug. 1, 2011.