The role of UN ambassador, explained

Zeid Ra’ad Al Hussein, distinguished global leader-in-residence at Perry World House, describes the workings of the U.S. ambassador to the U.N.—and whether it matters that it’s no longer of cabinet status.

Brandon Baker

Toxins from the tap

In Pennsylvania and hundreds of other locations around the country, manmade chemicals known as PFAS have been found in drinking water. Howard Neukrug discusses the potential harm, how local and federal agencies are responding, and the many related questions that remain unanswered.

Katherine Unger Baillie