For the first time in its history, the United States has seen its pristine credit rating downgraded, as Standard & Poor's cut the rating to AA-plus from AAA Friday night.More headlines from FoxBusiness.com:http://email.foxnews.com/t?ctl=127FA:7469D46E31DAE9CA6D1386BE765E13BA&------------------------------------------------------------To learn more about all of our newsletters and alerts visit: