A new “60 Minutes” investigative report alleges a connection between “Havana Syndrome” and Russian intelligence. The US government has assessed it is unlikely a foreign adversary is responsible, according to US intelligence officials familiar with the assessment. The reporter who led the investigation, Christo Grozev, speaks to CNN’s Erin Burnett.A new “60 Minutes” investigative report alleges a connection between “Havana Syndrome” and Russian intelligence. The US government has assessed it is unlikely a foreign adversary is responsible, according to US intelligence officials familiar with the assessment. The reporter who led the investigation, Christo Grozev, speaks to CNN’s Erin Burnett.