During the Cold war, there was a big fear of a possible nuclear attack from the Soviet Union, so when the US wanted to increase its spending on defense, it argued for it by saying that it needed to have better weapons to be able to prevent a possible attack.
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Answer:
push: political and religious persecution
pull: open immigration policies
push: overpopulation
pull: moneymaking opportunities
push: lack of economic opportunities
pull: the "American Dream"
Explanation: