For 10 points, name this event begun on November 9, 1989, which toppled a structure dividing a German city.
Four days before this event began, a rally featured such speakers as Markus Wolf and Marianne Birthler. It was arguably set in motion by a press conference that featured the ad-libbed words "effective immediately, without delay" in response to a question by Tom Brokaw. This event had been called for two years earlier in a speech described as "extreme" and "unpresidential" by Howard Baker. It was celebrated the following month by a Leonard Bernstein concert. This event began soon after the resignation of Erich Honecker and the ascension of Egon Krenz, and it had been famously commanded by Ronald Reagan in a challenge to Mikhail Gorbachev at the Brandenburg Gate. For 10 points, name this event begun on November 9, 1989, which toppled a structure dividing a German city.
Four days before this event began, a rally featured such speakers as Markus Wolf and Marianne Birthler.
Fall of the {Berlin Wall} [accept German Reunification, even though it isn't completely accurate, prompt on Peaceful Revolution, accept obvious equivalents]