Marines detain alleged Gulf drug cartel leader

Mexican Navy officers flank Mario Cardenas Guillen, also known as "El Gordo" and "M-1," during his presentation to the media in Mexico City, Tuesday, Sept. 4, 2012. Authorities says Cardenas Guillen, a top leader of the Gulf drug cartel, is the brother of Osiel Cardenas Guillen, who led the cartel until he was detained in 2003. Osiel Cardenas was extradited in 2007 to the United States and sentenced to 25 years in prison. (AP Photo/Alexandre Meneghini)The Mexican navy says it has detained a top leader of the Gulf drug cartel. USA, LLC