It was the computer classroom where I cracked . I 'd managed to remain detached until then . I wanted to tell the story . Look , but do n't internalize , was the mantra I was repeating inside my head . Tell the facts , explain what you are seeing and what happened . I focused . I do n't think I 've been somewhere with so much blood on the floor . Over the years , covering wars , I 've seen more than my share . Sarajevo , the war in Bosnia as Yugoslavia tore itself apart , was an inoculation against my visceral fear of the red stuff . In that conflict , mortars ripped through crowds of civilians . I soon learned how head wounds bleed . It 's different . You do n't forget . Here it was again in the auditorium . Dark and heavy . Do n't think , focus and do your job , I was reminding myself . But after a while I could n't . These were children , innocents . Parents not far from here are suffering a harrowing pain none of us can imagine . Parents , whose job in the army is to protect their country , not able to save their own children . The army officer showed us the doors where the children had tried to break out of the auditorium to run away from the Taliban gunmen . The carpet is sticky and red . The floor tiles a mess of the worst of Sarajevo . The Taliban could not have been more callous and calculating . Where the children were most concentrated they turned their automatic weapons on them at point-blank range . Cold-blooded murder . The officer tells me close to 100 children were gunned down right here . Again , I 'm telling myself to focus . Explain this brutal cowardly act . Leaving the dark , sad auditorium for the light of day I feel I can breathe better . I look up at the sky . It 's the color of hope -- clear blue and not a cloud to be seen . I should n't have looked down again . I 'm walking over to the classrooms at Army Public School and Degree College . Drops , smudges , pools of blood are everywhere . I 'm becoming conscious that I 'm trying not to step on them . It seems disrespectful somehow . How , I am thinking , could the Taliban be looking for even more bloodletting when they have already killed so many ? But they are . That 's when I get to the computer classroom , maybe 30 feet long by 15 feet across . Computers on rough benches down each side of the room . Space for maybe a dozen or so children to hone their computer skills . You did n't have to be rich to send your child to this school , and in Pakistan -- in Peshawar in particular -- on a global scale that implies your means might be quite humble indeed . Quite possibly some of these kids would n't have a computer at home . In our ever-interconnected world , lessons in this room could have been some of the most valuable to their futures . And that 's it . I 'm standing there realizing they have no futures now . The base horror that took place here is startlingly and immediately evident . Chairs still at computers , thick blood pooled underneath on the tile floor . The gunmen came in and before the children could escape opened fire . As I try to explain all this on camera , I can feel my voice cracking . It 's not a conscious thing , its what the brain does , a self-defense maybe . Such a horrible waste of so many bright futures , so many parents in pain . It hurts , and there is no getting away from it .
CNN 's Nic Robertson visits the Pakistan school where 132 children were killed . The Pakistani Taliban claimed responsibility for the attack on a military-run school. Not far away parents are grieving while he tries to understand the horror . There is no getting away from the pain of the wasted young lives .