The Allied Museum in Berlin has opened an exhibition on Thursday (June 28) dedicated to former U.S. President Ronald Reagan and the famous speech he held at the Berlin Wall demanding: "Mr. Gorbachev, tear down this wall!" Twenty years after former U.S. President Ronald Reagan held his famous "Tear Down This Wall" speech at the Brandenburg Gate, the Allied Museum in Berlin opened a special exhibition on Thursday (June 28) dedicated to the speech and the speaker. The museum has compiled "historic" and previously unknown material with the help of the Ronald Reagan Presidential Library and Museum and the Young America Foundation of the United States showing Reagan's role in overcoming the separation of two German states during the Cold War. Reagan held his now famous speech on June 12, 1987, not knowing that his appeal would become reality 881 days later. "General Secretary Gorbachev, if you seek peace, if you seek prosperity for the Soviet Union and eastern Europe, if you seek...