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Extras

Video thumbnail: PBS NewsHour Can this project clean up millions of tons of ocean plastic?

PBS NewsHour

Can this project clean up millions of tons of ocean plastic?

Can this project clean up millions of tons of ocean plastic?

Can this project clean up millions of tons of ocean plastic?

Video thumbnail: PBS NewsHour Michael Phelps nears retirement after record-breaking career

PBS NewsHour

Michael Phelps nears retirement after record-breaking career

Michael Phelps nears retirement after record-breaking career

Michael Phelps nears retirement after record-breaking career

Video thumbnail: PBS NewsHour Why Russia could cut diplomatic ties with Ukraine

PBS NewsHour

Why Russia could cut diplomatic ties with Ukraine

Why Russia could cut diplomatic ties with Ukraine

Why Russia could cut diplomatic ties with Ukraine

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