Abuja City Centre offers one of the best locations in the Nigerian capital's Central Business District. The fourth-floor offices are surrounded by buildings of the executive, legislative and judicial arms of the federal government - directly opposite is the Federal Ministry of Finance. Abuja and the Federal Capital Territory continues to expand every year and practically all multinational corporations have offices here. They do so because the Nigerian economy is the second largest in Africa with abundant natural resources (Nigeria's OPEC membership reflects is position as a major oil exporter); a well-developed financial infrastructure, including its own stock exchange; and thriving legal, communications and transport sectors. Although the agricultural sector is still important, the country also has manufacturing industries, including leather and textiles, cars, plastics and processed food. Abuja City Center's facilities include state-of-the-art videoconferencing. The city is served by Nnamdi Azikiwe International Airport.