Venezuelan President Hugo Chavez (R) and senior rebel commander Ivan Marquez of the Revolutionary Armed Forces of Colombia (FARC) speak to media at Miraflores Palace in Caracas November 8, 2007. Colombian President Alvaro Uribe has asked Chavez to mediate with the Marxist guerrillas from Latin America's oldest insurgency, the FARC, to break an impasse in negotiations meant to win the release of the group's most high-profile captives. REUTERS/Jorge Silva (VENEZUELA)