Morning Edition

President Obama held a wide-ranging news conference Tuesday. He bluntly challenged Republican critics of his Iran policy — saying the stakes are too high to let politics intrude. The news conference was designed to steal some of the spotlight from GOP presidential hopefuls on Super Tuesday.

Tina Brown, editor of The Daily Beast and Newsweek, tells us what she's been reading in a feature that Morning Edition likes to call "Word of Mouth." This month, Brown selects two pieces of writing profiling individuals at the center of political change in their respective countries.

A Penetrating New Profile Of Russia's Putin

When the state of California added the compound 4-methylimidazole, also known as 4-MI or 4-MEI, to its list of known carcinogens in 2011, it created a problem for the soda industry.

The caramel color they used to give colas that distinctive, brown hue contained levels of 4-MI that would have warranted a cancer warning label on every can sold in the state.

Nearly four years ago, the bank collapsed in the biggest bankruptcy in U.S. history — a record $639 billion. That set off a chain reaction and sent the economy spiraling. Lehman Bros. says now, it will continue to liquidate its holdings, and will start paying back creditors next month.