9 minutes agoWASHINGTON (AFP) - Democratic presidential contender John Kerry, his running mate John Edwards and 21 other US senators this week called on Colombian President Alvaro Uribe to break ties between the Colombian army and the country's right-wing paramilitaries. "We appreciate your commitment to establishing a secure future for Colombians and understand the difficult and complex challenges you face," the 23 senators told Uribe in a letter dated July 26, made available to AFP on Wednesday. However, said the letter, "we remain deeply concerned about the continued levels of violence directed at the civilian population." The letter, whose signatories...