In this image made from amateur video released by the Ugarit News and accessed Monday, July 23, 2012, Syrian government troops are seen on a military tank as it catches on fire during clashes with Free Syrian Army soldiers in Aleppo, Syria. The Syrian regime acknowledged for the first time Monday that it possessed stockpiles of chemical and biological weapons and said it will only use them in case of a foreign attack and never internally against its own citizens. (AP Photo/Ugarit News via AP video) TV OUT, THE ASSOCIATED PRESS CANNOT INDEPENDENTLY VERIFY THE CONTENT, DATE, LOCATION OR AUTHENTICITY OF THIS MATERIAL

BEIRUT, Lebanon (AP) -- The head of Syria's main opposition group in exile has called for a no-fly zone in border areas to protect civilians.
The president of the Syrian National Council, Abdelbaset Sieda, told The Associated Press on Sunday that such a move by the international community would show President Bashar Assad's regime that his opponents are serious.
Sieda's statement came a day after U.S. Secretary of State Hillary Rodham Clinton said Washington and Turkey were discussing a range of steps including a no-fly zone over some parts of Syria as the regime increasingly uses its air force to attack rebel positions.
"There must be special protection," he said.
Asked who will impose the no-fly zone, Sieda said: "We leave it to the international community."