Krishnan Guru-Murthy is in Mexico to see how the whole tourist industry is at risk of being destroyed. The drug wars in Mexico are well known and in the past generally kept away from the beach resorts, but that has all changed. Acapulco was once an internationally renowned tropical paradise, but violence has shot up over the last decade as the city is now in its fifth straight year of being Mexico's most murderous city. The murder and violence has spread to places like Cancun. Be warned there are scenes of gang violence you may find disturbing.