Why did the united states not complain about the construction of the berlin wall in 1961

The construction of the Berlin wall had shocked the western world, no one expected they would build a wall to isolate West Berlin. In response of the Berlin wall, U.S President John F. Kennedy had indicates that the western will not take any military action as long as they could remain the right and the free use of the transit in West Berlin. On July 25, President John F. Kennedy gave a speech to challenge soviet oppression and offer hope to the people that lived in the divided city. His words declares that he is one of the roman citizens just like one of you, and therefore, as a man who lived under freedom, he is responsible to let the people understand the great issues of living under freedom and take the pride of word "Ich bin ein Berliner"Accordingly to the construction of the Berlin Wall, it violated the postwar Potsdam Agreements, which apparently displayed the Soviet Union are holding the administration over the United kingdom, France and also united states

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I’m pretty sure it’s 4, you can check on the calculator