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Fighters of the UN-backed Libyan government forces stay alert in their base in Ain Zara frontline in Tripoli, Libya, on Feb. 10, 2020. (Photo by Amru Salahuddien/Xinhua)

Fighters of the UN-backed Libyan government forces stay alert in their base in Ain Zara frontline in Tripoli, Libya, on Feb. 10, 2020. (Photo by Amru Salahuddien/Xinhua)