An image taken from video obtained from the Shaam News Network, authenticated by AP reporting, shows attempts to rescue the wounded in Idlib, northern Syria following heavy bombing from military warplanes. Uncredited/ASSOCIATED PRESS hide caption

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Lebanese firefighters extinguish burning cars in Beirut following a huge bomb explosion. Hussein Malla/AP hide caption

itoggle caption Hussein Malla/AP

Palestinian Hamas leader Khaled Mashaal was a close ally of Syria and lived in the capital Damascus for years. But relations soured over the uprising in Syria, and Syria's state television denounced him in withering terms. Mashaal is shown speaking at a conference in Turkey on Sunday. Kayhan Ozer/AP hide caption

itoggle caption Kayhan Ozer/AP

A young Syrian girl wiped her tears after not being allowed entry to Turkey last month. Thousands of Syrians have fled to neighboring countries to escape the civil war raging in their nation. Aris Messinis /AFP/Getty Images hide caption

itoggle caption Aris Messinis /AFP/Getty Images

One-year-old Hassan was discovered in the rubble of an apartment building in Aleppo, Syria, giving his rescuers a moment of hope on a sad day. His parents were killed by the helicopter strike. Global Post hide caption

itoggle caption Global Post

Syrians fleeing increased violence arriving last week at the border between the Syrian town of Azaz and the neighboring Turkish town of Kilis. Phil Moore/AFP/Getty Images hide caption

itoggle caption Phil Moore/AFP/Getty Images