Will the new guerilla leader, Alfonso Cano, free US and other hostages?
A top leftist rebel commander turned herself in Sunday. Colombia's government is touting the move as the latest in a series of devastating blows to the leftist rebels.
Nelly Avila Moreno's call for dialogue comes as the Venezuelan President Hugo Chávez accuses the US of stirring tension.
Colombia says the files show Venezuela supports the leftist rebels, a claim Venezuelan President Hugo Chavez calls 'ridiculous.'
Leaders at Wednesday's summit in Nicaragua blamed US trade policies for the region's food crisis.
President Hugo Chavez says he is willing to talk with Colombia's rebel FARC for the release of three US defense contractors.