Secretary of State John Kerry is headed to Russia on Monday — a trip he calls "long overdue." Alex Brandon/AP hide caption

itoggle caption Alex Brandon/AP

President Obama meets with the emir of Qatar, Sheik Hamad bin Khalifa Al Thani, in the Oval Office on Tuesday. The emir is among a series of visiting Middle East leaders urging the U.S. to take a greater role in the Syrian conflict. Jewel Samad/AFP/Getty Images hide caption

itoggle caption Jewel Samad/AFP/Getty Images

A Syrian rebel patrols the area in the Sheikh Maqsud district of the northern city of Aleppo, on Thursday. Dimitar Dilkoff /AFP/Getty Images hide caption

itoggle caption Dimitar Dilkoff /AFP/Getty Images