On the sidelines of the EU summit in Brussels, U.K. Prime Minister David Cameron said the choice of Jean-Claude Juncker to head the European Commission marks "a bad day for Europe."
John Thys/AFP/Getty Images
French economist and academic Thomas Piketty, in his book-lined office at the French School for Advanced Studies in the Social Sciences, in Paris, earlier this month.
The U.S., the IMF's most powerful member, has refused to sign off on reforms. On Saturday, global leaders suggested the IMF would turn to other options if Congress doesn't act by year's end.
Mandel Ngan/AFP/Getty Images