NBC Nightly News Broadcast (Full) – July 19th, 2021

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Pediatrics group says all students should wear masks in school, U.S. accuses China of cyberattacks, and Jeff Bezos poised to be second billionaire in space. Watch “NBC Nightly News With Lester Holt” at 6:30 p.m. ET / 5:30 p.m. CT (or check…