In the new book "Up All Night: Ted Turner, CNN and the Birth of 24-Hour News," reporter Lisa Napoli recounts how Ted Turner's vision sparked a media revolution. Napoli speaks with Brian Stelter ahead of CNN's 40th birthday on June 1. She recalls her own internship at the fledging channel in 1981; the forgotten figures who made the channel into what it is today; and the international reach of CNN.
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