Homebrew submarine packed with cocaine

Four individuals were busted off Costa Rica's Pacific coast smuggling 3 tons of cocaine in a DIY submarine. According to the Associated Press, the vessel floated along at 7 miles per hour at a depth of six feet. The giveaway were three pipes, apparently used to provide oxygen to the passengers, moving along the surface of the water. (Link) Earlier this year, the Colombian navy captured a 60-foot sub they suspected was used to smuggle blow. (Link) And in 2000, a 100-foot drug smuggling sub was found under construction in Colombia. (Link) (Thanks to all who sent this in!)