As George Mitchell, President Obama's special envoy to the Middle East finishes up a day in the West Bank, we're taking a look at the challenges that lie ahead for all the President's envoys. Both Mitchell and Richard Holbrooke, the special envoy to Afghanistan and Pakistan, have long roads ahead of them. One man who can sympathize: Dan Simpson. Now an editor at the Pittsburgh Post-Gazette, Simpson served as special envoy to Somalia from 1994 - 1995 and was an Ambassador to Congo and the Central African Republic. He joins us now with his insight into the world of the special envoy.