Six months on from the massacre at Sandy Hook Elementary School, our Washington Correspondent Robert Moore has been investigating the gun culture in the US.
'America and its Guns' is starting now on ITV or you can watch it live on the ITV Player.
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The Hollywood actor died of complications from surgery.
Celebrities lined up to be photographed with the characters, who famously have antennas on their heads and TV screens on their stomachs.
The Olympic champion released a statement after a newspaper alleged his American coach may have broken anti-doping rules.