Use the excerpts below to answer the question.
From Stettin in the Baltic to Trieste in the
Adriatic an iron curtain has descended across
the continent.
Winston Churchill, 1946
Mr. Gorbachev, tear down this wall!
-President Ronald Reagan, 1987
Which event occurred during the time period between these two quotations?
"
The United States bombed Hiroshima and Nagasaki, Japan.
The North Atlantic Treaty Organization (NATO) was formed.
The Velvet Revolution ended Communist control of Czechoslovakia.
The Geneva Protocol was ratified.