2018年6月12日 历史上的今天：1987年6月12日 冷战背景下，美国总统里根对西柏林民众一次重要讲话，向苏联当时最高领导者戈尔巴乔夫喊话。这次讲话同时也被视为是冷战影响开始衰减直至结束的一个标志。
On this day in 1987, in one of his most famous Cold War speeches, President Ronald Reagan challenges Soviet Leader Mikhail Gorbachev to “tear down” the Berlin Wall, a symbol of the repressive Communist era in a divided Germany.
With the wall as a backdrop, President Reagan declared to a West Berlin crowd in 1987, “There is one sign the Soviets can make that would be unmistakable, that would advance dramatically the cause of freedom and peace.” He then called upon his Soviet counterpart: “Secretary General Gorbachev, if you seek peace–if you seek prosperity for the Soviet Union and Eastern Europe–if you seek liberalization: come here, to this gate. Mr. Gorbachev, open this gate. Mr. Gorbachev, tear down this wall.”Reagan then went on to ask Gorbachev to undertake serious arms reduction talks with the United States.
Most listeners at the time viewed Reagan’s speech as a dramatic appeal to Gorbachev to renew negotiations on nuclear arms reductions. It was also a reminder that despite the Soviet leader’s public statements about a new relationship with the West, the U.S. wanted to see action taken to lessen Cold War tensions. Happily for Berliners, though, the speech also foreshadowed events to come: Two years later, on November 9, 1989, joyful East and West Germans did break down the infamous barrier between East and West Berlin. Germany was officially reunited on October 3, 1990.
柏林墙：柏林墙（德语：Berliner Mauer；英语：Berlin Wall），正式名称为反法西斯防卫墙（德语：Antifaschistischer Schutzwall），是德意志民主共和国（简称“民主德国”或“东德”）在己方领土上建立环绕西柏林边境的边防系统，目的是阻止民主德国（含首都东柏林）和德意志联邦共和国（简称“联邦德国”或“西德”）所属的西柏林之间人员的自由往来。