Sergey Prokudin-Gorsky
Sergey Mikhaylovich Prokudin-Gorsky (, ;  – September 27, 1944) was a Russian chemist and photographer. He is best known for his pioneering work in colour photography and his effort to document early 20th-century Russia.
Communism in Russia
Konstantin Chernenko led the Soviet Union from 1984 until his death thirteen months later in 1985. Chernenko was unable to consolidate power and effective control of the Communist party. Chernenko did little to prevent the escalation of the cold war with the United States and Western Europe. Mikhail Gorbachev became the last leader of the Soviet Union in 1985 and led until the collapse of the Soviet Union in 1991. Gorbachev improved relations and trade with the West, and reduced the Cold War tensions. He implemented the Glasnost, which meant that Soviet people had the freedom that they never previously had; this included greater freedom of speech. The press was less controlled and many thousands of political prisoners and dissidents were released. Gorbachev removed the constitutional role of the Communist party. This led to the dissolution of the Soviet Union on December 26, 1991.