Afghanistan 18 Africa 7 Africa, North 4 Africa, Sub-Saharan 1 Africa, West 1 American Samoa 1 Arab countries 1 Arizona 1 Arlington 2 Asia 2 Asia, Central 4 Athens 1 Austin 2 Australia 2 Bangladesh 1 Belgium 2 Bengal (India) 1 Boston 1 Brussels 1 Burma 1 California 2 Canada 3 Caucasus, Northern 4 Caucasus, Northern (Russia) 2 Chad Basin 1 Chechni{u0361}a (Russia) 1 China 4 Colombia 3 Colorado 8 Connecticut 1 Developing countries 1 East Rutherford 2 Egypt 3 El Paso County 1 England 1 Europe 7 Europe, Eastern 1 European Union countries 3 Federally Administered Tribal Areas 1 Florida 1 Foreign countries 8 France 1 Great Britain 2 Greece 1 Guam 1 Houston 2 Illinois 1 India 2 Indonesia 1 Iowa 1 more ...