The European currency Euro logo stands in front of the European Central Bank (ECB) in Frankfurt, Germany on Aug. 4, 2011. The European Central Bank kept its key interest rate at 1.50 percent, a spokesman said as markets waited to see if the ECB would signal a resumption of eurozone bond purchases. Frank Rumpenhorst/AFP/Getty Images hide caption

itoggle caption Frank Rumpenhorst/AFP/Getty Images

A pedestrian passes a vendor selling Greek flags in Athens on Wednesday (Oct. 26, 2011). Greece's crushing debts triggered the latest crisis.

Thanassis Stavrakis/AP hide caption

itoggle caption Thanassis Stavrakis/AP