Europe's Debt Crisis Explained

November 18, 2011
FILE - In this Aug. 6, 2009 file photo, the sun is reflected on the facade of the European Central Bank ECB Tower, seen through the Euro symbol,  in Frankfurt, central Germany. Ninety European banks get their test results back Friday, July 15, 2011 as regulators seek to increase transparency and convince the markets that the global financial system can withstand big shocks like a possible Greek debt default. (AP Photo/Daniel Roland, File)
FILE - In this Aug. 6, 2009 file photo, the sun is reflected on the facade of the European Central Bank ECB Tower, seen through the Euro symbol, in Frankfurt, central Germany. Ninety European banks get their test results back Friday, July 15, 2011 as regulators seek to increase transparency and convince the markets that the global financial system can withstand big shocks like a possible Greek debt default. (AP Photo/Daniel Roland, File)

Europe's financial crisis continues to affect markets worldwide. Here's a look at its history, the major players and the critical issues.