Terry Gross

Historian Andrew Preston says questions in an undergraduate class her was teaching at the start of the 2003 invasion of Iraq spurred the research for his new book, Sword of the Spirit, Shield of Faith. "Once I started looking for religion [in U.S. foreign policy], it was everywhere," he says.

The Israeli government wants America's support and help for any possible attack on Iran. U.S. officials have said this isn't the right time for airstrikes. New York Times Washington correspondent David Sanger explains what's at stake for both sides.

Why did the flushing toilet take centuries to catch on? When did strangers stop sharing beds? And how did people brush their teeth with fish bones? Historical curator Lucy Worsley details the intimate history of the bedroom, bathroom and kitchen in her new book.