Guatemalans are voting in presidential and parliamentary elections after one of the bloodiest campaigns in the country's history. More than 50 candidates, activists and their relatives have been murdered in the run-up to the elections. The two main presidential contenders are Alvaro Colom, a centre-left businessman, and a former general, Otto Perez Molina. They have vowed to fight crime and reduce poverty. Mr Colom, who is running for the presidency for the third time in a row, has promised to overhaul the security forces and the judicial system, which many criticise for being slow, corrupt and inefficient. Mr Perez Molina...