text: How else can people understand tragedies such as Littleton , in which normal middle-class kids are not playing baseball or flirting with girls or even duking out their differences after school on the playground ; they are nursing monstrous visions of murder and mayhem , while building bombs in their clueless parents ' garage .
  
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  In Littleton , normal middle-class kids are engaging in harmful activities , like building bombs in their garage .