How did the US respond to the Soviet unions actions in Europe?

The United States launched the succesful Plan Marshall to allow ravaged European economies to recover and build new prosperity; the United States organized and maintained an airlift to carry supplies to a Berlin blocked by Soviet troops in 1948; the USA supported the creation of a Western Germany under a democratic government; it also sponsored the creation of NATO to oppose a perceived Soviet threat.

How did U. S. leaders respond to the threat of Soviet expansion in Europe? World War II convinced U. S. leaders that the policies of isolationism and appeasement had been mistakes. To counter the growing Soviet threat, they sought new ways to keep the U. S. safe and protect its interests abroad.