There were lots of foreign changes that presented challenges for the US. I'll give you a few examples from different time periods. First would be when England wanted to tax the Americans in the Revolutionary period. They did this to try and restrict America's freedom. Another example would be that Russia had spies during the cold war period. This was to gain intelligence of the US war plans. Also when Germany sent the Zimmerman Telegram to Mexico during the WWII period. This was to get Mexico to launch a surprise attack on the US.
Answer:
After the September 11, 2001 attacks, the U.S. government responded with immediate action (including rescue operations at the site of the World Trade Center and grounding civilian aircraft), and long-term action, including investigations, legislative changes, military action and restoration projects.
Explanation:
For the first time citizens could actually particpate in the goverment
Answer:
In 1800, Napoleon, the First Consul of the French Republic, regained ownership of Louisiana as part of a broader project to re-establish a French colonial empire in North America. ... The Louisiana Purchase extended United States sovereignty across the Mississippi River, nearly doubling the nominal size of the country.
Explanation:
I hope this helped you out!