What 2 events happened in 1949 that can be considered a turning point in the cold war

On June 10, 1963, President John F. Kennedy delivered what came to be called his “strategy of peace” speech that paved the way for a limited nuclear test ban treaty with the Soviet Union.

When Mikhail Gorbachev assumed power of the Soviet Union in 1985, he instituted the policies of glasnost and perestroika in hopes of sparking the sluggish economy. What resulted from this taste of freedom was the revolution that ended the Cold War.