NBC Nightly News Broadcast (Full) – December 17th, 2020 | NBC Nightly News

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FDA advisers recommend Moderna’s Covid vaccine, powerful winter storm blasts Northeast, and inside effort to track origin of Covid-19.

Watch “NBC Nightly News With Lester Holt” at 6:30 p.m. ET / 5:30 p.m. CT (or check your local…