elizabeth palmer reports. >> reporter: lamar and henadi should be in class right now.ot lamar's grandfather is in shock. calling for god to punish her killers. but this is war. we'll never know which rebel fighter shot the mortar that ripped into 8-year-old zeina's body. surgeons did their best, but zeina died of devastating shrapnel wounds. and so did 5-year-old ismael, who never even made it out of intensive care. samir hellaq, deputy director of education in aleppo, was overcome by the senselessness of it all. "these kids committed no crime," he says. "they were unarmed. they just wanted to learn." this is exactly where that lethal mortar fell. 7:45 in the morning in a perfectly ordinary residential street in government-held aleppo. and the kids who were hurt and killed, they were just walking along on their way to school. nearby, the men of telal neighborhood are cleaning up after a rocket smashed into this street and killed another 5-year-old boy. it's been an especially violent 48 hours in aleppo, with bombs and artillery thundering down on the rebel-occupied eas

elizabeth palmer tells us that among them were two >> reporter: lamar and henadi should be in class right now, not lying in the hospital morgue. out in the parking lot, lamar's grandfather is in shock. calling for god to punish the killers. but this is war. we'll never know which rebel fighters shot the mortar that ripped into eight-year-old zeina's body. zeina died of devastating shrapnel wounds, and so did five-year-old ismael, who never even made it out of intensive care. samir hellaq, deputy director of education in aleppo, was overcome by the senselessness of it all. "these kids committed no crime, "he says. "they were unarmed. they just wanted to learn." this is exactly where that lethal mortar fell, 745 residential street in government-held aleppo. and the kids who were hurt and killed. they were just walking along on their way to school. nearby, the men of telal neighborhood are clearing up after a rocket smashed into this street and killed another five-year-old boy. it's been an especially violent 48 hours in aleppo with bombs and artillery thundering down on the rebel-occupied e