In April 1952, Harry Truman nationalized the steel industry to prevent the workers' strike, that was scheduled to begin that month. It led to the famous Steel Seizure Case, the first case in the U.S. court history to limit the power and entitlements of the president of America. The jury took a stand that the president doesn't hold it in his power to interfere with private property.
The action that has come to symbolize the end of the Cold War is 3. tearing down the Berlin Wall. The Wall had been formed by the Soviet Union to separate East Berlin (Soviet-controlled) from West Berlin (Western-controlled). Its fall allowed Berliners (and Germans) from the Eastern half finally make their way to the Western half.
Grace period seems correct
