Terrorist threats have been a major problem and challenge to the American economy. This is because the stability of the political condition as well as the political relationship of the U.S. To other nations is where the American economy bases a large part of its economic state. Therefore, terrorist threats greatly affect the flow of investments in the U.S., driving away possible investors in fear of not getting the right earnings due to unstable peace and freedom in the country. The nation continuously overcomes this challenge through strategic intelligence responses applied and conducted by concerned organizations.

Another challenge to the American economy is the rising in power of the Euro currency. As everyone knows, the U.S. dollar has been the major currency around the world. It is in fact the world reserve currency...

However, as the American economy was shaken by a lot of negative factors caused by the 9/11 attack, the Euro currency made its way on overtaking the U.S. dollar. The U.S. though is still facing this challenge and is so far doing well in making the nation stand again from its fall caused by the 9/11 attacks.
Bibliography

Longley, Robert. Facing Challenges of U.S. Economy: Bush. http://usgovinfo.about.com/cs/uspresident/a/radio031304.htm

OECD. Economic Survey of the United States 2005: Challenges Facing the U.S. Economy. http://www.oecd.org/document/11/0,2340,en_2649_201185_35513867_1_1_1_1,00.html

Danger Time for America. http://www.economist.com/opinion/displaystory.cfm?story_id=5385434