What region of Afghanistan borders Pewar, Pakistan and was home to the Mujahedeen?
Pewar:  It is the closest point in Pakistan to Kabul and borders on the Tora Bora region of Afghanistan. Tora Bora:  Tora Bora and the surrounding Spīn Ghar range had natural caverns formed by streams eating into the limestone, that had later been expanded into a CIA-financed complex built for the Mujahedeen.
Tora Bora