Jack F. Matlock Jr., former US ambassador to the USSR, in the Washington Post, here:
President Bill Clinton supported NATO’s bombing of Serbia without U.N. Security Council approval and the expansion of NATO to include former Warsaw Pact countries. Those moves seemed to violate the understanding that the United States would not take advantage of the Soviet retreat from Eastern Europe. The effect on Russians’ trust in the United States was devastating. In 1991, polls indicated that about 80 percent of Russian citizens had a favorable view of the United States; in 1999, nearly the same percentage had an unfavorable view.