"It's a whole different, specific psychology going on there." Tuesday's Colorado school shooting shares a rare connection with the deadly Columbine school shooting 20 years ago: Both had two shooters. https://t.co/h1teamr742

"It's a whole different, specific psychology going on there." Tuesday's Colorado school shooting shares a rare connection with the deadly Columbine school shooting 20 years ago: Both had two shooters. https://t.co/h1teamr742 (via Twitter http://twitter.com/CNN/status/1126052577337139200)