5-year Havana Syndrome investigation finds new evidence of who might be responsible

60 Minutes producers Michael Rey and Oriana Zill de Granados discuss the evolution of their 5-year investigation into “Havana Syndrome,“ which led them to what one source calls “a receipt“ for acoustic weapon testing done by a Russian intelligence unit. “60 Minutes“ is the most successful television broadcast in history. Offering hard-hitting investigative reports, interviews, feature segments and profiles of people in the news, the broadcast began in 1968 and is still a hit, over 50 seasons later, regularly making Nielsen's Top 10. Subscribe to the “60 Minutes“ YouTube channel: Watch full episodes: Get more “60 Minutes“ from “60 Minutes: Overtime“: Follow “60 Minutes“ on Instagram: Like “60 Minutes“ on Facebook: Follow “60 Minutes“ on Twitter: Subscribe to our newsletter: Download the CBS News app: Try Paramount free: For video licensing inquiries, contact: licensing@