WHY IT MATTERS: Issues at stake in election - Article Photos 27/40

FILE - This Oct. 9, 2012 file photo shows protesters kicking a police barrier during a protest in front of the parliament in Athens. Europe is struggling to control a debt crisis, save the euro currency and stop a repeat of the 2008 financial crisis that sent the world spinning into recession. The continent’s troubles are the No. 1 threat to the fragile U.S. economy. If the crisis spreads to the U.S., Americans could find it harder to get loans and the country could slip back into recession. (AP Photo/Lefteris Pitarakis, File)