article_snippet.sent: Pictured: Mass murderer Adam Lanza, left, who gunned down 26 people at Sandy Hook elementary school and James Holmes, right, accused of shooting dead 12 people at an Aurora movie theatre .
article_snippet.sent: Adam Lanza, 20, became one of America's most notorious murderers when he went on an 11 minute shooting spree at Sandy Hook elementary School in 2012.
article_snippet.sent: he killed 20 student and six teacher in the massacre.
article_snippet.sent: In a movie theatre in Aurora.
article_snippet.sent: Colorado, 12 people were shot dead and 70 others injured by alleged gunman James Holmes.