Diplomacy: The U.S. revoked visas of four Honduran officials, claiming that a coup occurred there. But if they could travel, the Hondurans could educate Americans otherwise. So why are we trying to silence them?Nobody pushes "dialogue" or "citizen diplomacy" more than the U.S. Department of State. So how can it justify revoking the visas on these Hondurans in what a department spokesman confirmed Tuesday as "a turning of the screw." The Hondurans targeted are the very ones whose presence would be valuable to the U.S. if it means to understand the constitutional action that necessitated the removal of President Mel...