Foreign adversaries not responsible for 'Havana syndrome,' say U.S. intel agencies

A newly declassified review by U.S. intelligence agencies says that the so-called “Havana syndrome” was most likely not caused by the actions of a foreign adversary. The syndrome refers to when diplomats and spies working in Cuba said they experienced bizarre sounds and sensations followed by unexplained illnesses and symptoms. NBC’s Ken Dilanian has the details of the investigation.