Azerbaijan (UK: /ˌæzərbaɪˈdʒɑːn, -ˈʒɑːn/ (listen), US: /ˌɑːzərbaɪˈdʒɑːn, ˌæz-/; Azerbaijani: Azərbaycan [ɑːzæɾbɑjˈd͡ʒɑn]), officially the Republic of Azerbaijan (Azerbaijani: Azərbaycan Respublikası [ɑːzæɾbɑjˈd͡ʒɑn ɾespublikɑˈsɯ]), is a landlocked country in the South Caucasus region of Eurasia at the crossroads of Eastern Europe and Western Asia. Azerbaijan is a unitary semi-presidential republic. It is one of six independent Turkic states and an active member of the Turkic Council and the TÜRKSOY community. Azerbaijan has diplomatic relations with 158 countries and holds membership in 38 international organizations, including the United Nations (since 1992), the Council of Europe, the Non-Aligned Movement, the OSCE, and the NATO Partnership for Peace (PfP) program. It is one of the founding members of GUAM, the Commonwealth of Independent States (CIS) and the Organisation for the Prohibition of Chemical Weapons. Azerbaijan also holds observer status in the World Trade Organization.