Ryan Crocker explains how dialogue has worked before, and how Bush ruined it
                                
                                
                                    (Newser) -
                                    Many in Washington, Tehran,  and   elsewhere  are deeply skeptical about the latest stab at  Iranian-American dialogue , but Ryan Crocker thinks there's reason for optimism. "Although most Americans may be unaware of it, talks with Iran have succeeded in the past—and they can succeed again," the  ex-ambassador...