Bill Whitaker reports on how Russian spies used a popular piece of software to unleash a virus that spread to 18,000 government and private computer networks. Ken Burns, the filmmaker known for his exhaustive documentaries on American subjects, gives Scott Pelley a glimpse into how his films are made, the message he wants to convey with them and how he became the person he is today. Sharyn Alfonsi reports on the band that desegregated Mardi Gras parades in New Orleans and is now playing through the pandemic.

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