Transcript for World Marks 25th Anniversary of the Berlin Wall Tear Down
There is a global milestone to celebrate tonight. Behind me, the Berlin's gate, on cured for decades by the wall dividing east and west. 25 years ago, the wall came down. So many in the world worry about a new cold war between the U.S. And Russia. Here is ABC's John donvan. Reporter: In Berlin today, they went with light to remember these are balloons, 8,000 of them, each with a light in them to mark the path of the scar, that wurns ran through this city the path of the Berlin wall. Constructed in 1961 to stop this, their own citizens from communism. To get to freedom on the west side. The wall, the ultimate symbol, the talking point. Mr. Gorbachav, tear down this wall. Reporter: He was the soviet leader who let this happen 25 years ago when a crowd of east Germans surged and the guards let them through. Our peter Jennings was right there. The wall is suddenly irrelevant. Reporter: Here is how it changed. A leader who grew up there, angeang Merkel. The fall that the dreams can come true. Not all dreams, former enemies becoming good friends. And gorbachav describes it as a new cold war. But 25 years ago tonight, it was still all dream come true when the wall like this line of balloons came apart in a stunning instant. John donvan, ABC news, Washington.
This transcript has been automatically generated and may not be 100% accurate.