U.N.-Arab League envoy Kofi Annan listens to a question during a joint news conference with Iranian Foreign Minister Ali Akbar Salehi, unseen, in Tehran, Iran, Wednesday, April 11, 2012. Annan appealed to Syria's key ally Iran to support his plan to end the violence wracking the Arab country, saying that "any further militarization of the conflict would be disastrous." (AP Photo/Vahid Salemi)