Question

What did the Soviet Union do in 1949 that made
Americans nervous?

Answer 1

The following lists events that happened during 1949 in the Union of Soviet Socialist Republics . 25 January – The Council for Mutual Economic Assistance (CMEA or COMECON) is established by the Soviet Union and other communist nations. This Soviet Union –related article is a stub.

Step-by-step explanation:

Answer 2

Well I know that the bombing might have made them nervous

Step-by-step explanation:

in 1949 the Soviet union conducted a first nuclear test

This might have made them nervous but I am not 100%