A new study finds that many women with early stage breast cancer don't benefit from chemotherapy.
Mexico’s President-elect, Enrique Peña Nieto, will take office on Saturday and vows to change his country’s drug war strategy.
Outgoing President Felipe Calderón declared war on the cartels six years ago, and the fight has been devastating, claiming more than 40,000 lives.
Peña Nieto says he will downsize the federal police, which grew seven-fold under Calderon, but has been dogged by corruption allegations.
The BBC’s Will Grant reports.