With bounties of several million dollars offered for their capture, Mexican drug lords Ismael “El Mayo” Zambada and Joaquin Guzman Lopez, son of the infamous “El Chapo”, were at the top of the most wanted list for US authorities. The two leaders of the Sinaloa Cartel were arrested on Thursday after landing in Texas on a private plane. But as the cartel is one of the most powerful organised crime groups in Mexico, the power vacuum resulting from their arrests could trigger new bouts of violence.