NBC Nightly News Broadcast (Full) – November 18th, 2020 | NBC Nightly News

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Pfizer says Covid-19 vaccine is 95 percent effective, FAA clears Boeing 737 Max to fly again after two fatal crashes, and new fallout after Trump fires top cybersecurity official.

Watch “NBC Nightly News With Lester Holt” at 6:30 p.m. ET /…