Leon Panetta scoffs at Iran's claim it is harvesting US drone for intelligence It's, obviously, a classified program. I don't want to get into the particulars," he said during a briefing on his flight to Bogota, at the start of a Latin American tour. Iran claimed one of its cyberwarfare team hacked the drone's controls by confusing its GPS guidance system, and has since claimed it would reverse-engineer the drone. US officials acknowledged losing the drone on a spying mission over Iran, but asserted the stealth aircraft came down because of a technical problem, not any Iranian intervention. Mr Panetta, in his first visit to Latin America as Pentagon chief, said the United States was concerned about the Guards' alleged attempts to expand their influence in the Middle East as well as in South America. "That in my book relates to expanding terrorism, and I think that's one of the areas we're all concerned about," he said. Speaking later at a joint press conference in Bogota with his Colombian counterpart Juan Carlos Pinzon, the US defence secretary announced the sale of 10 military helicopters to Colombia, including five Black Hawks, to help the government in its fight with FARC leftist rebels.