Malaria is a disease of the developing world, but some Americans are being infected with malaria intentionally to help medical research. Reporter Eric Niiler profiles volunteers in a US Army study of an experimental malaria vaccine.
Russian president Dmitri Medvedev asserted himself this week by firing Moscow's powerful mayor. Now he faces another test ï¿½ what to do about Mikhail Khodorkovsky. Reporter Eric Niiler speaks with Khodorkovsky's lawyers.
Mexico is celebrating the bicentennial of its independence with parties across the country. The celebrations mark the 1810 uprising that paved the way for the end of Spanish rule in 1821. Eric Niiler reports from Mexico.