Terry Gross

In 14 years on Saturday Night Live, Darrell Hammond did many impressions, including Bill Clinton and Al Gore. But few of his cast members knew that Hammond struggled with drugs, alcohol and self-cutting as a result of systematic childhood abuse.

How do skyscrapers withstand 100-mph winds? How does air circulate inside tall buildings? And what happens when you flush a toilet on the 100th floor? Those questions and more are answered by Kate Ascher in her new book exploring the inner workings of skyscrapers.

Facebook, Google, Amazon and Apple are expanding rapidly into finance, advertising, media and retail. Tech writer Farad Manjoo outlines how the four companies are heading in new directions -- and encroaching on each other's territory -- as they try to expand their customer base.