In his Iron Curtain speech, Winston Churchill affirmed his wish to side with the United States against the Soviet Union and his belief that only the United States possessed nuclear weapons.
The expression Iron Curtain was implemented by Winston Churchill to make reference to the border, both physical as well as ideological, that divided Europe into two blocks after World War II.
When delivering that speach, he said “From Stettin in the Baltic to Trieste in the Adriatic, an iron curtain has descended across the Continent.”
There were a number of predecessor agencies to INS between 1891 and 1933. The Immigration and Naturalization Service (INS) was formed in 1933 by a merger of the Bureau of Immigration and the Bureau of Naturalization. Both those Bureaus, as well as the newly created INS, were controlled by the Department of Labor.
Here are some examples of how the different branches work together: The legislative branch makes laws, but the President in the executive branch can veto those laws with a Presidential Veto. The legislative branch makes laws, but the judicial branch can declare those laws unconstitutional.