In a major reversal, some U.S. intelligence agencies are now saying a foreign adversary could be behind the mysterious "Havana Syndrome" brain injuries reported by U.S. diplomats and government workers overseas. While the overall assessment from the intelligence community remains, it is "very unlikely" Havana Syndrome could be caused by a foreign actor, two out of seven U.S. intelligence agencies now say it is possible a foreign adversary could have developed a weapon that could cause such brain injuries.