The U.S. claimed it killed Abdul Rahman Mustafa al-Qaduli.
U.S. officials have announced that at least four cruise missiles launched from a Russian ship, aimed at targets in Syria, have crashed into Iranian locations by mistake.
American man was believed to be fighting alongside Islamist militants.
Threatening to lay down arms if exiled opposition does not help.
Syria's gov't says Israeli airstrikes have killed 4 and wounded 9.
The most serious confrontation with Israel since the start of the conflict.
Calls Syria one the "most dangerous places on earth" to be a child.
13 nuns and their three helpers freed as part of prisoner exchange.
Syria has until March 15 to destroy 12 chemical weapons sites.
Cited chemical attack as "one of many horrors" in the civil war.