The Defense Department believes the Revolutionary Armed Forces of Colombia (FARC), a leftist guerrilla organization, has obtained surface-to-air missiles, which could upset the balance of power between the insurgent group and the Colombian military as they attempt to negotiate a peace accord, according to defense officials and analysts. Gen. John Kelly, commander of U.S. Southern Command, disclosed the Defense Department's finding in testimony prepared for the House Armed Services Committee on March 20 . "The hundreds of millions of dollars...