Is a campaign pledge coming to fruition? Richard Holbrooke, the U.S. envoy to Afghanistan, exchanged words today with Iran's deputy foreign minister during a summit at the Hague to discuss Afghanistan. The unplanned meeting ended with the two promising to "stay in touch," Secretary of State Hillary Clinton said, describing it as a "brief and cordial exchange." The encounter is the first concrete example of Barack Obama's plan to engage America's critics through dialogue. Both the U.S. and Iran have expressed guarded interest in some form of collaboration on the war in Afghanistan.