What was seen by U2 spy planes that caused the American military to become concerned?

United States and the Soviet Union that began with the shooting down of a U.S. U-2 reconnaissance plane over the Soviet Union and that caused the collapse of a summit conference in Paris between the United States, the Soviet Union, the United Kingdom, and France.

Explanation:

it would have concentrated power in the executive branch of the government. it would have restored balance among the three branches of government. it would have set a precedent for government intervention in the economy. it would have signaled an end to all the programs of roosevelt’s new deal.

did this .

answer: the risk-return relationship. generally, the higher the potential return of an investment, the higher the risk. there is no guarantee that you will actually get a higher return by accepting more risk. diversification enables you to reduce the risk of your portfolio without sacrificing potential returns.

explanation: