U.S. Secretary of State Condoleezza Rice has told Colombia that Washington will go on supporting its fight against drug traffickers and left-wing insurgency. Rice praised the Colombian authorities for winning back large areas of land from left-wing rebels. The BBC's correspondent in Bogota says Colombian President Alvaro Uribe is the most loyal US ally in South America. With the help of $600m of US military assistance Uribe has extradited many drug traffickers to the US. Rice made the comments as she visited Colombia as part of a five-day tour of the region. She has already visited Brazil and will also travel to Chile and El Salvador.