Russia has used a closely guarded communications channel with America's top general to propose the two former Cold War foes cooperate to rebuild Syria and repatriate refugees to the war-torn country, according to a U.S. government memo. The proposal was sent in a July 19 letter by Valery Gerasimov, the chief of the Russian military's General Staff, to U.S. Marine General Joseph Dunford, chairman of the Joint Chiefs of Staff. The Russian plan, which has not been previously reported, has received an icy reception in Washington. The memo said the U.S. policy was only to support such efforts if there...