Facing hundreds of thousands of student protesters, Piñera takes a stab at reforming the education system. Will he find common ground with demonstrators?

Argentine President Cristina Fernández de Kirchner chose Economy Minister Amado Boudou as her running partner for the October vote. The decision signals her confidence in his economic policies and hope of reaching young voters.

Venezuelan President Hugo Chávez has been unusually quiet during a prolonged recovery from emergency surgery while in Cuba. But energy shortages and a prison riot draw attention to the leadership vacuum back at home.