The reason people immigrate from one country to another is because they might have natural disasters or land and a occupation is hard to find there. So people might just be migrating to find happiness or a better life than what they had.
Answer:
1: air traffic controllers
2:fired
3:Day O'Connor
Explanation:
<span>the Union of Soviet Socialist Republics abbreviated to the USSR or a shortened to the Soviet Union, was a Marxist–Leninist state on the Eurasian continent that existed between 1922 and 1991.
hope i helped!!!!!!</span>