
President Obama returns a salute prior to boarding Air Force One at Andrews Air Force Base, Md., Friday, June 25, 2010, prior to traveling to Canada for the G-20 summit. (AP Photo/Charles Dharapak)

**FILE** Spain's Prime Minister Mariano Rajoy speaks June 19, 2012, to the press during the G-20 summit in Los Cabos, Mexico. (Associated Press)

**FILE** Spain's Prime Minister Mariano Rajoy speaks June 19, 2012, to the press during the G-20 summit in Los Cabos, Mexico. (Associated Press)

President Obama speaks June 19, 2012, during a news conference at the G-20 Summit in Los Cabos, Mexico. (Associated Press)

President Obama speaks June 19, 2012, during a news conference at the G-20 Summit in Los Cabos, Mexico. (Associated Press)

President Obama listens June 18, 2012, to Russian President Vladimir Putin before the opening of the first plenary session of the G-20 Summit in Los Cabos, Mexico. (Associated Press)

President Obama listens June 18, 2012, to Russian President Vladimir Putin before the opening of the first plenary session of the G-20 Summit in Los Cabos, Mexico. (Associated Press)

President Obama attends a G-20 summit session in Los Cabos, Mexico, on Monday. (Associated Press)

Customers browse discounted goods for sale at a "1 euro store" Monday in Athens. Greeks voted Sunday for parties supporting the nation's bailout package, which Mr. Obama, at the G-20 summit, said "indicates a positive prospect." (Associated Press)