Pfizer believes Covid booster shot may offer better protection, President Biden defends decision to end war in Afghanistan, and fans banned from Olympics after new state of emergency declared in Tokyo. Watch “NBC Nightly News With Lester Holt” at 6:30 p.m. ET / 5:30 p.m. CT (or check your local listings). 00:00 Intro 01:45 Delta… Continue reading NBC Nightly News Broadcast (Full) – July 8th, 2021