Riaz Mohammad Khan was the Wilson Center’s Pakistan Scholar in 2009. Previously, he spent nearly four decades in Pakistan’s diplomatic service, where his last positions were foreign secretary (2005-08) and ambassador to China (2002-05). He also held posts dealing with Europe, Central Asia, Afghanistan, arms control, and disarmament. He is the author of Untying the Afghan Knot: Negotiating Soviet Withdrawal, written while he was a diplomat-in-residence at Georgetown University.