Colombia

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Agents from the police anti explosive unit, inspect the wreckage of a car bomb that exploded outside the building of Caracol Radio station in Bogota, Colombia, Thursday, Aug. 12, 2010. The explosion shook Colombia's capital on Thursday, injuring at least six people, police said. No deaths were reported. (AP Photo/William Fernando Martinez)

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Colombia's Justice and Interior Minister German Vargas Lleras, second right, and Colombia's Police Chief Gen. Oscar Naranjo, right, arrive at the scene where a car bomb exploded outside the building of Caracol Radio station in Bogota, Colombia, Thursday, Aug. 12, 2010. The explosion shook Colombia's capital on Thursday, injuring at least six people, police said. No deaths were reported. (AP Photo/Fernando Vergara)

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Agents from the police anti-explosive unit walk next to a damaged public bus near the scene of a car bomb explosion outside the Caracol Radio station in Bogota, Colombia, on Thursday, Aug. 12, 2010. The explosion injured at least nine people, police said. No deaths were reported. (AP Photo/William Fernando Martinez)

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Tiger Woods of the United States, center, and Colombia's Camilo Villegas, right, and caddie Brett Waldman walk across the Swilken Burn bridge on the 18th hole during the first round of the British Open Golf Championship on the Old Course at St. Andrews, Scotland, Thursday, July 15, 2010. (AP Photo/Alastair Grant)

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Colombia's Camilo Villegas in action on the 9th green during the first round of the British Open Golf Championship on the Old Course at St. Andrews, Scotland, Thursday, July 15, 2010. (AP Photo/Alastair Grant)

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ASSOCIATED PRESS Switzerland's Roger Federer reaches for a forehand return against Colombia's Alejandro Falla at the All England Lawn Tennis Championships at Wimbledon, Monday, June 21, 2010.

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Presidential candidate Juan Manuel Santos participates in a televised debate in Bogota, Colombia, on Thursday, June 17, 2010. Colombians are holding a presidential runoff on Sunday, June 20, 2010. (AP Photo/Fernando Llano)

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Relatives of a miner killed in a mine explosion, react while mourning him in Amaga, northwestern Colombia, Friday, June 18, 2010. Dozens of miners were trapped and feared dead after a fiery blast tore through a tunnel in a Colombian coal mine during a shift change, killing at least 16 workers. (AP Photo/William Fernando Martinez)

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** FILE ** A unidentified miner from Amaga, Colombia, 2010. (Associated Press)

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A man stands next to the coffins of four miners killed at a coal mine in Amaga, northwestern Colombia, Friday, June 18, 2010. Dozens of miners were trapped and feared dead after a fiery blast tore through a tunnel in a Colombian coal mine during a shift change, killing at least 16 workers. (AP Photo/William Fernando Martinez)

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**FILE** Grenades allegedly belonging to soldiers who were killed by rebels sit on the ground in Corinto in southern Colombia in November. (Associated Press)

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**FILE** Colombian army soldiers unload supplies from a helicopter during a February operation to relieve troops in Alto Guaduas, Caqueta state, in southern Colombia, a region with a strong presence of the Revolutionary Armed Forces of Colombia. (Associated Press)