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A fighter of the UN-backed Government of National Accord (GNA) is seen at a frontline in Tripoli, Libya, on Aug. 18, 2019. (Photo by Amru Salahuddien/Xinhua)

A fighter of the UN-backed Government of National Accord (GNA) is seen at a frontline in Tripoli, Libya, on Aug. 18, 2019. (Photo by Amru Salahuddien/Xinhua)