Pensioners queue outside a national bank branch in Athens on Thursday. Greek banks are running out of cash and the situation poses further danger to the economy, analysts say. Aris Messinis/AFP/Getty Images hide caption

itoggle caption Aris Messinis/AFP/Getty Images

People wait in line to withdraw euros from an ATM after Greece closed its banks Monday in Athens. Milos Bicanski/Getty Images hide caption

itoggle caption Milos Bicanski/Getty Images

Puerto Rico Gov. Alejandro Garcia Padilla in April delivered his budget address for the next fiscal year at the Capitol building in San Juan. Ricardo Arduengo/AP hide caption

itoggle caption Ricardo Arduengo/AP

This 55-foot-tall statue of the Jolly Green Giant — the instantly recognizable icon for General Mills' Green Giant line of frozen vegetables — is in Blue Earth, Minn., about 100 miles away from the company's headquarters in Minneapolis. Robin Zebrowski/Flickr hide caption

itoggle caption Robin Zebrowski/Flickr

Demonstrators hold flags and banners during a protest march in solidarity with Greece in Brussels on Sunday. Heads of state in the eurozone will meet in Brussels on Monday for a special summit to discuss the financial crisis with Greece. Virginia Mayo/AP hide caption

itoggle caption Virginia Mayo/AP

A Boeing 737 at the company's factory in Renton, Wash. Foreign airlines that want to buy Boeing planes often do so with loans underwritten by the Export-Import Bank. Saul Loeb/AP hide caption

itoggle caption Saul Loeb/AP