‘Havana Syndrome’ linked to Russian spy unit, ’60 Minutes’ report says USA TODAYNew evidence suggests Russia is behind the serious Havana Syndrome Fox NewsHavana Syndrome Mystery Solved? Putin Spies Tied to US Diplomat ‘Attacks’ NewsweekRussia is behind Havana Syndrome, attacks on U.S., former lead Pentagon investigator says Miami HeraldHavana Syndrome mystery continues as a lead military investigator says bar for proof was set impossibly high CBS News