FILE - In this April 23, 1988 file photo, an Afghan cyclist passes by a Soviet military convoy led by an armored personnel carrier on the highway leading to Kabul The Soviet troops will begin its first phrase of withdrawal on May 15. Afghanistan is marking the 31st anniversary of the Soviet Union's last soldier leaving the country, Saturday, Feb. 15, 2020. This year's anniversary comes as the United States negotiates its own exit after 18 years of war, America's longest. (AP Photo/Liu Heung Shing, File)