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As Americans reel from a horrific act of violence in Newtown, Conn., debates over gun control, mental health care and children's safety have reopened across the US and beyond. GlobalPost brings you news and analysis from around the world in the wake of a shooting that left 20 children and eight adults dead.
Stars turn to social media to mourn tragedy.
Celebrities took to Twitter today to express their condolences over the shootings at Sandy Hook Elementary School in Newtown, Connecticut: