KABUL, Afghanistan

Having served as the highest-ranking Muslim in the U.S. administrations under four presidents, Afghanistan-born Zalmay Khalilzad has resumed his daunting task of reviving talks, with Taliban insurgents.

Since the collapse of the post-Soviet regime in Kabul, to the rise and fall of Taliban, Khalilzad’s diplomatic endeavors in Afghanistan at times were seen with deep suspicion but also with profound optimism.

Read more: Zalmay Khalilzad: Man of peace or pieces for Afghanistan?