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Turkish military vehicles enter Syria to take part in a joint patrol with Russian troops, in the countryside of the town of Derbassiye in Syria's northeastern Hasakeh province, on the border with Turkey, on July 14, 2021. (Photo by Delil SOULEIMAN / AFP) (Photo by DELIL SOULEIMAN/AFP via Getty Images)

Turkish military vehicles enter Syria to take part in a joint patrol with Russian troops, in the countryside of the town of Derbassiye in Syria's northeastern Hasakeh province, on the border with Turkey, on July 14, 2021. (Photo by Delil SOULEIMAN / AFP) (Photo by DELIL SOULEIMAN/AFP via Getty Images)

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Russian and Turkish soldiers gather as Turkish military vehicles enter Syria to take part in a joint patrol with the Russians, in the countryside of the town of Derbassiye in Syria's northeastern Hasakeh province, on the border with Turkey, on July 14, 2021. (Photo by Delil SOULEIMAN / AFP) (Photo by DELIL SOULEIMAN/AFP via Getty Images)

Russian and Turkish soldiers gather as Turkish military vehicles enter Syria to take part in a joint patrol with the Russians, in the countryside of the town of Derbassiye in Syria's northeastern Hasakeh province, on the border with Turkey, on July 14, 2021. (Photo by Delil SOULEIMAN / AFP) (Photo by DELIL SOULEIMAN/AFP via Getty Images)

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A Turkish soldier stands behind the border line with Syria, during a joint Turkish and Russian patrol of military vehicles (unseen) in the countryside of the town of Derbassiye in Syria's northeastern Hasakeh province, on the border with Turkey, on July 14, 2021. (Photo by Delil SOULEIMAN / AFP) (Photo by DELIL SOULEIMAN/AFP via Getty Images)

A Turkish soldier stands behind the border line with Syria, during a joint Turkish and Russian patrol of military vehicles (unseen) in the countryside of the town of Derbassiye in Syria's northeastern Hasakeh province, on the border with Turkey, on July 14, 2021. (Photo by Delil SOULEIMAN / AFP) (Photo by DELIL SOULEIMAN/AFP via Getty Images)

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Turkish military vehicles are pictured during a joint patrol with Russian troops (unseen) in the countryside of the town of Derbassiye in Syria's northeastern Hasakeh province, on the border with Turkey, on July 14, 2021. (Photo by Delil SOULEIMAN / AFP) (Photo by DELIL SOULEIMAN/AFP via Getty Images)

Turkish military vehicles are pictured during a joint patrol with Russian troops (unseen) in the countryside of the town of Derbassiye in Syria's northeastern Hasakeh province, on the border with Turkey, on July 14, 2021. (Photo by Delil SOULEIMAN / AFP) (Photo by DELIL SOULEIMAN/AFP via Getty Images)