Photographer James Nachtwey has spent his professional life in the places people most want to avoid: war zones and refugee camps, the city flattened by an earthquake, the village swallowed by a flood, the farm hollowed out by famine.

Few Westerners know Iran as well as Robin Wright: her first trip there as a journalist was in 1973, and she has covered every important milestone since, from the Islamic revolution and the hostage crisis to the more recent staring contest with the West over Tehran's nuclear program.

Pain is the most private experience, but its causes, whether natural or man-made, demand public accounting.

Nancy Gibbs Quotes