1980s

File:1980s replacement montage02.PNG|thumb|335px|From top left, clockwise: The first Space Shuttle, Columbia, lifts off in 1981; US president Ronald Reagan and Soviet leader Mikhail Gorbachev ease tensions between the two superpowers, leading to the end of the Cold War; The fall of the Berlin Wall in 1989 is considered to be one of the most momentous events of the 1980s; In 1981, the IBM Personal Computer is released; In 1985, the Live Aid concert is held in order to fund relief efforts for the famine in Ethiopia during the time Mengistu Haile Mariam ruled the country; Pollution and ecological