What we know about the mass shooting at a Virginia Walmart.

At least six people are dead and multiple others were injured after a gunman opened fire at a Chesapeake, Virginia, Walmart Tuesday night. Officials believe the suspected gunman was a "disgruntled employee." CBS News homeland security and justice reporter Nicole Sganga is at the scene with more.

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U.S. advances to World Cup knockout stage after defeating Iran

U.S. advances to World Cup knockout stage after defeating Iran

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