In this photo released by the Syrian official news agency SANA, shows a man receiving oxygen through respirators following a suspected chemical attack on his town of al-Khalidiya, in Aleppo, Syria, Saturday, Nov. 24, 2018. Some 50 civilians were being treated following a suspected poison gas attack by Syrian rebel groups on the government-held Aleppo city in the country's north, according to Syrian state media. (SANA via AP)
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