As Palestinians prepare to lower the flag over their shuttered mission in Washington, no one can predict when they will return to the city where just a quarter of a century ago a diplomatic triumph was celebrated on a sunlit White House lawn.

Hosted by then-U.S. President Bill Clinton, Palestinian and Israeli leaders came together on Sept. 13, 1993, to sign the first of the Oslo Accords, designed to be the foundation of a permanent peace deal within five years that would create two states, side-by-side.

The three men who would win the Nobel Peace Prize the next year — Prime Minister Yitzhak Rabin and Foreign Minister Shimon Peres of Israel and Palestine Liberation Organization chief Yasser Arafat — did not live to see peace in their time.