The following is an expert from a speech given by president Ronald Reagan in 1987, in wich he refers tothe berllin wall. How does this expert illustrate his role in the collapse of communisim?

We come to Berlin, we American Presidents, because it's our duty to speak, in this place, of freedom. But I must confess, we're drawn here by other things as well: by the feeling of history in this city, more than 500 years older than our own nation; by the beauty of the Grunewald and the Tiergarten; most of all, by your courage and determination. Perhaps the composer, Paul Lincke, understood something about American Presidents. You see, like so many Presidents before me, I come here today because wherever I go, whatever I do: "Ich hab noch einen koffer in Berlin." [I still have a suitcase in Berlin.]

Our gathering today is being broadcast throughout Western Europe and North America. I understand that it is being seen and heard as well in the East. To those listening throughout Eastern Europe, I extend my warmest greetings and the good will of the American people. To those listening in East Berlin, a special word: Although I cannot be with you, I address my remarks to you just as surely as to those standing here before me. For I join you, as I join your fellow countrymen in the West, in this firm, this unalterable belief: Es gibt nur ein Berlin. [There is only one Berlin.]

C. Reagan recognizes the need for Soviet expansion, but wants it to occur peacefully.