Terry Gross

When Standard & Poor's recently lowered the U.S. government debt rating for the first time in history, it set off a firestorm of criticism, from the Obama administration to Wall Street. The downgrade raised questions about the influence of S&P and other agencies, which also faced blame in the financial crisis of 2007-'08.

America's anti-terrorism strategy has evolved in the years after the Sept. 11 attacks. New York Times reporters Thom Shanker and Eric Schmitt explain some of the tactics used by the United States over the past decade to disrupt al-Quaida both in real life and online.

A pair of identical twins lived apart for 28 years after one off them was accidentally switched with another infant in the hospital nursery. Twin expert Nancy Segal details what happened next in Someone Else's Twin: The True Story of Babies Switched at Birth.