Former US Secretary of State Hillary Clinton delivers a speech during a conference at the National Auditorium in Mexico City.

Former US Secretary of State Hillary Clinton delivers a speech during a conference at the National Auditorium in Mexico City.

Former US Secretary of State Hillary Clinton delivers a speech during a conference at the National Auditorium in Mexico City.

Former US Secretary of State Hillary Clinton delivers a speech during a conference at the National Auditorium in Mexico city.