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A young man pushes his bicycle through debris following a reported air strike by Syrian government forces in the rebel-held town of Douma, east of the capital Damascus, on October 29, 2015. Syrian government air strikes on a market and a hospital killed several civilians in Douma, the Syrian Observatory for Human Rights monitor and activists said. Dozens more were wounded, several seriously, and the toll is likely to rise. AFP PHOTO / ABD DOUMANY (Photo credit should read ABD DOUMANY/AFP/Getty Images)

A young man pushes his bicycle through debris following a reported air strike by Syrian government forces in the rebel-held town of Douma, east of the capital Damascus, on October 29, 2015. Syrian government air strikes on a market and a hospital killed several civilians in Douma, the Syrian Observatory for Human Rights monitor and activists said. Dozens more were wounded, several seriously, and the toll is likely to rise. AFP PHOTO / ABD DOUMANY        (Photo credit should read ABD DOUMANY/AFP/Getty Images)