Washington - The United States is backing a year-old intelligence assessment that health problems affecting, and in some cases incapacitating, hundreds of American personnel around the world are not the result of a weapon wielded by a U.S. adversary. The White House, the Pentagon and the State Department Monday stood by a March 2023 report by the National Intelligence Council that concluded it is "very unlikely" the adverse symptoms known as Havana Syndrome were caused by enemy operatives,