Frank DíAngelis, right, Columbine High School Principal at time of the 1999 school massacre and still principal today is comforted by long time friend Cindy Stevenson, Superintendent of JEFCO Schools after a news conference where Di'Angelis talked about the Connecticut School Shooting at Jefferson County School headquarters in Golden, Colo., on Thursday, Dec. 14, 2012.  In a state that was rocked by the 1999 Columbine school massacre and the Aurora movie theater shooting less than six months ago, Friday's shootings renewed debate over why mass shootings keep occurring and whether gun control can stop them.  (AP Photo/Ed Andrieski)
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