Turkish Prime Minister Recep Tayyip Erdogan is meeting with US President Barack Obama at the White House on Thursday.<br />Erdogan has been calling for more aggressive steps to topple Syrian President Bashar Assad's regime.<br /><br />But the Washington remains reluctant to take the kind of action that Ankara would like to see, including establishing a no-fly zone in Syria.<br />Al Jazeera’s Hashem Ahelbarra reports from Istanbul.
