Lisa Armstrong covers humanitarian issues around the world. She has written for magazines, newspapers and organizations including The Washington Post, National Geographic, Parade, USA Weekend, O Magazine, Unicef and the World Bank.

Despite accusations of human-rights abuses, former Haitian President Jean-Claude Duvalier was met with cheers and tears after his surprise return from exile Monday. Lisa Armstrong reports from Port au Prince.

The devastating earthquake that hit Haiti a year ago today still bedevils the country. Lisa Armstrong talks to a Haitian woman with AIDS and says the island went from being an AIDS success story to one that is facing a major health disaster.