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Sunday, March 29, 2015

US Labor Department on Twitter: "Tragic 1968 explosion prompted law that changed coal mine safety and health forever: http://t.co/gELYBe8rwH http://t.co/zcQeB3FbCj"

US Labor Department on Twitter: "Tragic 1968 explosion prompted law that changed coal mine safety and health forever: http://t.co/gELYBe8rwH http://t.co/zcQeB3FbCj"

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