Three bus drivers were shot to death in a single day in Guatemala, illustrating the threat that the country's transport workers are under from criminal groups who demand extortion payments. The first victim, Mario Augusto Salazar, was killed by three gunmen who were traveling as passengers in a bus he was driving between between two towns in southwestern Guatemala. Authorities are investigating whether he was killed for failing to pay extortion fees, reported La Prensa... (GunPolicy.org)