Ten years have passed since Ajoon Khan¡¯s son died in a ghastly attack by the Pakistani Taliban that killed about 150 people, mostly children, at a military-run school in Peshawar, in northwestern Pakistan.

But the pain of loss is unrelenting ¡ª it grows only deeper with time. Khan, a lawyer, said he could never forget the parents sobbing and pleading outside the school gates, the soldiers storming the building, the children and the teachers fleeing in terror.

¡°It has been nearly a decade, but it feels like nothing has changed,¡± said Khan, speaking last week, just before the Dec. 16 anniversary of the death of his son, Asfand, who had been in the 10th grade. ¡°If you look at the security situation in the country, it feels that our children¡¯s sacrifices were in vain.¡±