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Complete coverage of the attack at a high school outside of Pittsburgh, PA, where a student went on a bloody rampage and knifed 20 people on the morning of April 9, 2014.

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Stab-Spree Suspect Alex Hribal Included in Franklin Regional Yearbook Stab-Spree Suspect Alex Hribal Included in Franklin Regional Yearbook Stab-Spree Suspect Alex Hribal Included in Franklin Regional Yearbook Stab-Spree Suspect Alex Hribal Included in Franklin Regional Yearbook

Stabbing-Spree Suspect Included in School Yearbook

Keith Srakocic / AP, file
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AskNBCNews: How Safe Are Our Schools Replay

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Doctor: Stabbing Victim Had 'Severe Injuries'

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Son, Mom Recount 'Chaos' of School Stabbing

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Stabbing Victim Mom: 'I Hope This Child Can Find Peace'

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Stabbing Suspect Charged

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Police Chief Details Charges Against Suspect in Stabbing Spree

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Official Comments on Claims of School Bullying Problem

Teen Suspected in Stabbing Spree Will Be Charged As Adult

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Community Holds Vigil for School Stabbing Victims

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Student: 'This is not supposed to happen here'

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Student's Heroic Actions May Have Saved Classmate's Life

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School Stabbing: Students Saw 'Blood Everywhere'

Teen Held on 26 Counts in High School Bloodbath

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Police Details Chaotic Scene of School Stabbing

Assistant Principal Sam King, Hero in Stabbings, Is 'the Greatest Guy'

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EXCLUSIVE: Girl Tells Stab Victim, 'We're Going to Go to Prom'

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Stabbing Suspect, Principal Live on Same Street

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17-Year-Old Student in Critical Condition, On Life Support

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Emergency Director: Stabbing Timing Assisted Police Response

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First Photo Emerges of Teen Suspect in School Stabbing

Student Victim 'Chillin at Children's' After Stabbing

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Student: 'There Was Blood All Over the Floor'

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Hospital Officials Detail Condition of Stabbing Victims

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Police: School Principal Tackled Stabbing Suspect

PA Governor Corbett Statement on High School Stabbing

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Authorities: Stabbing Suspect, Victims All Students

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20 Reported Stabbed At Pittsburgh Area School

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Multiple Stabbings Reported At Pittsburgh Area School

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