The Pentagon says about a dozen B-1 bombers have been moved from a U.S.-used U.K. air base back to the United States, citing operational security and risks of keeping so many bombers at the small base. The move comes after arrests linked to a suspected security threat at RAF Fairford. The British government believes Iran was involved in the threat. "This plan has been in effect for about ten days. But Air Force officials say, simply put, it's too much risk," CBS News' Charlie D'Agata reports. #pentagon #iran #uk