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TOPSHOT - A Syrian man carries a bicycle amid the rubble of destroyed buildings following a reported air strike by Syrian government forces in the rebel-held area of Douma, east of the capital Damascus, on October 21, 2015. AFP PHOTO / SAMEER AL-DOUMY (Photo by SAMEER AL-DOUMY / AFP) (Photo by SAMEER AL-DOUMY/AFP via Getty Images)

TOPSHOT - A Syrian man carries a bicycle amid the rubble of destroyed buildings following a reported air strike by Syrian government forces in the rebel-held area of Douma, east of the capital Damascus, on October 21, 2015. AFP PHOTO / SAMEER AL-DOUMY (Photo by SAMEER AL-DOUMY / AFP) (Photo by SAMEER AL-DOUMY/AFP via Getty Images)