Echoes S News Today

drugs. tough, new auto emission standards about to be announced, but will they push more americans to go electric a big upside of artificial intelligence, detecting cancer much earlier, and predicting when it might strike and the young, bold athletes sharing their culture and superstar tony hawk. >> announcer: this is "nbc nightly news" with lester holt >> welcome. once again, in the tragic aftermath of a mass shooting, were getting a person look at pol risking their own lives to...