Thomas Friedman said that no country with a McDonald's had gone to war with another; however, the "Golden Arches Theory of Conflict Prevention" is incorrect. Exceptions are the 1989 United States invasion of Panama, NATO's bombing of Serbia in 1999, the 2006 Lebanon War, and the 2008 South Ossetia war. McDonald's suspended operations in its corporate-owned stores in Crimea after Russia annexed the region in 2014. On August 20, 2014, as tensions between the United States and Russia strained over events in Ukraine, and the resultant U.S. sanctions, the Russian government temporarily shut down four McDonald's outlets in Moscow, citing sanitary concerns. The company has operated in Russia since 1990 and at August 2014 had 438 stores across the country. On August 23, 2014, Russian Deputy Prime Minister Arkady Dvorkovich ruled out any government move to ban McDonald's and dismissed the notion that the temporary closures had anything to do with the sanctions.