A U.S. Court of Appeals ruling reinstates the FDA's authority -- at least temporarily -- to stop e-cigarettes from entering the country after a lower court ruled that the agency does not have the authority to regulate electronic cigarettes, even though Congress granted the agency the power to regulate tobacco products in 2009. The FDA filed the appeal after a U.S. District Court judge granted an injunction on Jan. 14 that blocked the FDA from stopping electronic cigarettes from entering the country.