Dave Cullen, author of "Columbine," discusses the Parkland, Fla., shooting survivors and says that while he doesn't foresee the protests slowing, he's not sure they'll lead to lasting change. For the full interview, [click here](https://cheddar.com/videos/from-columbine-to-parkland-a-journey-of-gun-reform).

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Coal Miners Hail Rule to Slow Rise of Black Lung
Now the federal Mine Safety and Health Administration has proposed a rule that would cut the current limit for silica exposure by half — a major victory for safety advocates. But there is skepticism and concern about the government following through after years of broken promises and delays.
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