What was the response of the united states?

The post-9/11 period is the time after the September 11, 2001 terrorist attacks, characterized by heightened suspicion of non-Americans in the United States, increased government efforts to address terrorism, and a more aggressive American foreign policy.

Explanation:

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explanation:

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2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.