The Cancun that tourists don’t often see: soaring murders amid a bloody drug war

It's not part of Cancun that tourists travel to see: heavily armed police working to stop a soaring homicide rate. The fallout of Mexico's campaign targeting drug cartel leaders is spilling onto the periphery of the famous beach destination, where fractured gangs fight for control. Yet the area's violence has rarely put vacationers in danger. Special correspondent Danny Gold reports.