GENEVA (AP) — Lakhdar Brahimi has seen faces like these before, barely able to remain in the same room, much less speak to each other. Lebanese, Afghans, Iraqis, now Syrians. Even, two decades ago, Algerians like himself.

For days now, the veteran U.N. mediator has presided over peace talks intended to lead the way out of Syria’s civil war. He brought President Bashar Assad’s government and the opposition face to face for the first time on Saturday, while still ensuring that they don’t have to enter by the same door or address each other directly. He is 80. He is patient.