Which country is the largest producer of tungsten (75% of world's output)?
S-75 Dvina the system was sold to most Warsaw Pact countries and was provided to China, North Korea, and eventually, North Vietnam. While the shooting down of Francis Gary Powers' U-2 in 1960 is the first publicized success for the S-75, the first aircraft shot down by the S-75 was a Taiwanese Martin RB-57D Canberra high-altitude reconnaissance aircraft. The aircraft was hit by a Chinese-operated S-75 site near Beijing on October 7, 1959. Over the next few years, the Taiwanese ROCAF would lose several aircraft to the S-75: both RB-57s and various drones. On May 1, 1960, Gary Powers' U-2 was shot
Korea Tungsten Company Korea Tungsten Company Korea Tungsten Company (KTC, Korean: 대한중석, pronounced "daehan jungsuk", Hanja: 大韓重石) was a major South Korean manufacturer of tungsten cutting tools, tungsten powder, and related metal-cutting products. It was the 28th-largest chaebol by asset with subsidiaries such as Korea Tungsten Construction and Korea Sintered Metal. With the national government, KTC also established POSCO, which is now the world's second largest steelmaker by output. In 1998, Keo-Pyung, then KTC's proprietor, defaulted on its loans and was declared bankrupt by its main creditor, CHB Bank. On May 12, 1998, Keo-Pyung announced that it would shed 14 of its 19