I like to call him Ronnie RayGun ...but he gave that rousing speech and challenge at the Berlin Wall's Brandenburg Gate:
"Tear down this wall!" was the famous challenge from United States President Ronald Reagan to Soviet leader Mikhail Gorbachev to destroy the Berlin Wall.
In a speech at the Brandenburg Gate commemorating the 750th anniversary of Berlin, by the Berlin Wall on June 12, 1987, Reagan challenged Gorbachev, then the General Secretary of the Communist Party of the Soviet Union, to tear it down as a symbol of Reagan's desire for increasing freedom in the Eastern Bloc.