Terry Gross

Yemen is now considered to be "the greatest external threat facing the U.S. homeland in terms of terrorism," says investigative reporter Jeremy Scahill.

In her new book, Breasts: A Natural and Unnatural History, Florence Williams offers her take on why breasts are getting bigger and developing earlier, why tumors seem to gravitate toward the breast, and how toxins from the environment may be affecting hormones and breast development.

The actress is nominated for her fifth Tony Award for the Broadway musical Porgy and Bess. "There's very few quiet moments for Bess," she says. "They're all very big, very emotional. ... And to commit to that night after night is very difficult.