Sseven members of the U.S. Immigration and Customs Enforcement dive team, formed in 2004 and the only one of its kind in the U.S., were searching for large metal boxes that Latin American cocaine traffickers sometimes weld or clamp onto freighters and even cruise ships to smuggle drugs. The boxes also could be used to hide terrorist bombs or weapons.
In this Feb. 4, 2011 photo, a U.S. Immigration and Customs Enforcement diver checks the hull of the 498-foot container ship M/V Seaboard Pride in the murky waters of the Port of Miami in Miami. The divers were searching the ship for so-called "parasitic" devices used to smuggle drugs and potentially, terrorist bombs or weapons. (AP Photo/Wilfredo Lee)
In this undated photo provided by U.S. Immigration and Customs Enforcement, a so-called "parasitic" device, used to smuggle drugs and potentially, terrorist bombs or weapons is shown after it was found attatched to a ship. (AP Photo/U.S. Immigration and Customs Enforcement, HO)
In this Feb. 4, 2011 photo, U.S. Immigration and Customs Enforcement divers check the hull of the 498-foot container ship M/V Seaboard Pride in the murky waters of the Port of Miami in Miami. The divers were searching the ship for so-called "parasitic" devices used to smuggle drugs and potentially, terrorist bombs or weapons. (AP Photo/Wilfredo Lee)
In this Feb. 4, 2011 photo, a U.S. Immigration and Customs Enforcement diver looks at the propeller of the 498-foot container ship M/V Seaboard Pride in the murky waters of the Port of Miami in Miami. The divers were searching the ship for so-called "parasitic" devices used to smuggle drugs and potentially, terrorist bombs or weapons. (AP Photo/Wilfredo Lee)
In this Feb. 4, 2011 photo, a U.S. Immigration and Customs Enforcement diver looks at the propeller of the 498-foot container ship M/V Seaboard Pride in the murky waters of the Port of Miami in Miami. The divers were searching the ship for so-called "parasitic" devices used to smuggle drugs and potentially, terrorist bombs or weapons. (AP Photo/Wilfredo Lee)
In this Feb. 4, 2011 photo, U.S. Immigration and Customs Enforcement divers prepare to dive the 498-foot container ship M/V Seaboard Pride at the Port of Miami in Miami. The divers were there to check the ship's hull for so-called "parasitic" devices used to smuggle drugs and potentially, terrorist bombs or weapons. (AP Photo/Wilfredo Lee)
In this Feb. 4, 2011 photo, U.S. Immigration and Customs Enforcement special agent and assistant chief of the ICE Tactical Dive Team, Dean Lang, right, talks with Capt. Dariusz Karbowiak aboard the 498-foot container ship M/V Seaboard Pride docked at the Port of Miami in Miami. The divers were there to check the ship's hull for so-called "parasitic" devices used to smuggle drugs and potentially, terrorist bombs or weapons. (AP Photo/Wilfredo Lee)
In this Feb. 4, 2011 photo, U.S. Immigration and Customs Enforcement divers board the 498-foot container ship M/V Seaboard Pride to inform its captain of a random check and to secure all machinery before diving it at the Port of Miami in Miami. The divers were there to check the ship's hull for so-called "parasitic" devices used to smuggle drugs and potentially, terrorist bombs or weapons. (AP Photo/Wilfredo Lee)
In this Feb. 4, 2011 photo, U.S. Immigration and Customs Enforcement divers suit up to dive the 498-foot container ship M/V Seaboard Pride at the Port of Miami in Miami. The divers were there to check the ship's hull for so-called "parasitic" devices used to smuggle drugs and potentially, terrorist bombs or weapons. (AP Photo/Wilfredo Lee)
In this Feb. 4, 2011 photo, U.S. Immigration and Customs Enforcement divers look over the 498-foot container ship M/V Seaboard Pride before diving at the Port of Miami in Miami. The divers were there to check the ship's hull for so-called "parasitic" devices used to smuggle drugs and potentially, terrorist bombs or weapons. (AP Photo/Wilfredo Lee)
In this Feb. 4, 2011 photo, U.S. Immigration and Customs Enforcement divers look over the 498-foot container ship M/V Seaboard Pride before diving at the Port of Miami in Miami. The divers were there to check the ship's hull for so-called "parasitic" devices used to smuggle drugs and potentially, terrorist bombs or weapons. (AP Photo/Wilfredo Lee)