Operation Twin Oceans was a "multi-jurisdictional investigation" that targeted one of the most-wanted alleged drug kingpins, Colombia's Pablo Rayo-Montano. Authorities say his drug trafficking organization included production, international transportation and distribution. According to the Drug Enforcement Administration (DEA), Rayo-Montano used a vast array of vessels, including the submersible pictured here, to smuggle tons of cocaine from Colombia to the United States and Europe. (DEA)