Ukraine ousted Khrushchev and became the Soviet leader from 1964 to 1982. Many prominent Soviet sports players, scientists, and artists came from Ukraine. On 26 April 1986, a reactor in the Chernobyl Nuclear Power Plant exploded, resulting in the Chernobyl disaster, the worst nuclear reactor accident in history. This was the only accident to receive the highest possible rating of 7 by the International Nuclear Event Scale, indicating a "major accident", until the Fukushima Daiichi nuclear disaster in March 2011. At the time of the accident, 7 million people lived in the contaminated territories, including 2.2 million in Ukraine. After the
Science and Technology Center in Ukraine and the United States. In 1997, the original treaty was amended to include the European Union supplanting Sweden's membership in the organization. <br> 1993-1997<br> 1997 onward<br> <br> <br> <br> Science and Technology Center in Ukraine The Science and Technology Center in Ukraine commonly known as the STCU, is an intergovernmental organization dedicated to the non-proliferation of nuclear, biological and chemical weaponry and related technologies. It was established in 1993, through an international multilateral treaty to help scientists and researches involved in the research, development and production of nuclear, biological and chemical assets in former Soviet member states to transition from