At W.Va. Mine Explosion Memorials, Changes Promised

One year after 29 coal miners died in a massive explosion at the Upper Big Branch mine, state and federal officials vowed to never let such disasters happen again.

Source: http://www.npr.org/blogs/thetwo-way/2011/04/06/135166714/at-w-va-mine-explosion-memorials-changes-promised?ft=1&f=1003

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