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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, we're getting a person look at pol risking their own lives to stop an active shooter late this afternoon, louisville police releasing body cam video of officers...

A new set of targeted and immune-boosting drugs can add months or even years to life expectancy according to results released this weekend at a top conference.

After two decades, lung cancer-specific survival remained at 81% in I-ELCAP program

ATU Images/Getty Images(NEW YORK) -- Artificial intelligence, or AI, is continuing to expand into many areas of our lives and one of those is cancer detection. Researchers are using machine-learning to build tools in the realm of cancer detection and diagnosing, potentially catching tumors or lesions that doctors could miss. AI is also being used to help treat patients or communicate with patients about the complexities surrounding their cancer treatments. Despite the advancements that have been made, experts warn that there are drawbacks such as real fears that cancers could be over diagnosed...

ATU Images/Getty Images(NEW YORK) -- Artificial intelligence, or AI, is continuing to expand into many areas of our lives and one of those is cancer detection. Researchers are using machine-learning to build tools in the realm of cancer detection and diagnosing, potentially catching tumors or lesions that doctors could miss. AI is also being used to help treat patients or communicate with patients about the complexities surrounding their cancer treatments. Despite the advancements that have been made, experts warn that there are drawbacks such as real fears that cancers could be over diagnosed...