Syrian regime forces backed by Hezbollah troops have retaken an airfield near the strategic border town of Qusayr, as President Bashar al-Assad continues to consolidate gains against rebels. The battle that has taken a heavy toll on the civilian population. Meanwhile, the main opposition group has said it will not enter peace talks unless foreign fighters leave the Qusayr battle. Al Jazeera's Rawya Rageh reports from Istanbul.