Overview: Bus drivers in Guatemala City are being murdered at a rate of one every other day as part of a campaign of extortion that threatens to bring the city to its knees. Extortion is the main source of income for Guatemala's criminal gangs, earning them millions of dollars a year, and the drivers are killed to instil fear as the gangs maintain their grip on the city. Reporter Seyi Rhodes and director Matt Haan begin their journey at Santa Rosa on the outskirts of the city. A bus driver has been shot at nine in the morning. The family have already arrived at the scene and are distraught. The bus company owner says he doesn't know why his driver was shot, but eight other divers have been killed on the same route in the last year.