Please check back often as this is regularly updated. 1  Rim Exit Devices. 2  Rim Device: This type is used on single doors or pairs of doors that have a vertical mullion (either removable or fixed) in between the doors. The strike plate is surface mounted on the frame (or mullion).
Mikhail Gorbachev was the last General Secretary of the Soviet Union. He brought about massive economic, social, and political changes and helped bring an end to both the Soviet Union and the Cold War.
Cold War: A Brief History. The End of the Cold War. With the passing of several Soviet leaders, Mikhail Gorbachev assumed control of the Soviet Union. His rise to power ushered in an era of perestroika (restructuring) and of glasnost (openness). U.S.-Soviet relations improved considerably during the middle 1980s.