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And the east of the Euphrates, where the zone of operation “Source of Peace” is located, for some time becomes the scene of the confrontation between the two superpowers. Last week, on the M-4 highway, near Tel Tamra, the US military stopped a Russian patrol heading for Kamyshly. And yesterday, the two countries exchanged signals using their air forces. After the United States sent Apache helicopters to the region, Russia, also sending its Mi-8 helicopters, threatened Washington.