type of honey (Ankara Balı) which is known for its light color and is mostly produced by the Atatürk Forest Farm and Zoo in the Gazi district, and by other facilities in the Elmadağ, Çubuk and Beypazarı districts. Çubuk-1 and Çubuk-2 dams on the Çubuk Brook in Ankara were among the first dams constructed in the Turkish Republic. Ankara is the center of the state-owned and private Turkish defence and aerospace companies, where the industrial plants and headquarters of the Turkish Aerospace Industries, MKE, ASELSAN, HAVELSAN, ROKETSAN, FNSS, Nurol Makina, and numerous other firms are located. Exports to foreign countries from these defense and aerospace firms have steadily increased in the past decades. The IDEF in Ankara is one of the largest international expositions of the global arms industry. A number of the global automotive companies also have production facilities in Ankara, such as the German bus and truck manufacturer MAN SE. Ankara hosts the OSTIM Industrial Zone, Turkey's largest industrial park. A large percentage of the complicated employment in Ankara is provided by the state institutions; such as the ministries, subministries, and other administrative bodies of the Turkish government. There are also many foreign citizens working as diplomats or clerks in the embassies of their respective countries. Geography Geographically, Ankara is located in the middle of the Kızılırmak and Sakarya rivers, and the Sakarya River forms its border with Eskişehir in the west. Ankara shares its borders with Bolu and Çankırı in the north; Konya in the south and Kırıkkale in the east. Ankara and its province are located in the Central Anatolia Region of Turkey. The Çubuk Brook flows through the city center of Ankara. It is connected in the western suburbs of the city to the Ankara River, which is a tributary of the Sakarya River. Climate Ankara has a cold semi-arid climate (Köppen climate classification: BSk). Under the Trewartha climate classification, Ankara has a temperate humid continental climate (Dc). Due to its elevation and inland location, Ankara has cold and snowy winters, and hot and dry summers. Rainfall occurs mostly during the spring and autumn. The city lies in USDA Hardiness zone 7b, and its annual average precipitation is fairly low at , nevertheless precipitation can be observed throughout the year. Monthly mean temperatures range from in January to in July, with an annual mean of . Demographics Ankara had a population of 75,000 in 1927.