NBC Nightly News with Lester Holt

WATCH: Dallas Police chief on open carry: Increasingly challenging when people have an AR-15, and a shooting occurs, and we don't know if they're the shooter or not; 'good guy with a gun' theory breaks down when we can't tell a good guy from a bad guy.
by José Lourenço via Facebook at July 13, 2016 at 08:41AM
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