Joaquin "El Chapo" Guzman, the leader of Mexico's Sinaloa Cartel, escaped from a maximum security prison in Mexico on July 11, 2015. A widespread manhunt that included highway checkpoints, stepped up border security and closure of an international airport failed to turn up any trace of Guzman by Monday, more than 24 hours after he got away. Widely considered the world's richest and most powerful drug trafficker before his capture last year, Guzman slipped down a shaft from his prison cell's shower area late Saturday and disappeared into a sophisticated mile-long tunnel with ventilation, lighting and a motorcycle apparently used to move dirt.