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When sick people search the Web for remedies or tweet about their symptoms, they're sending an early warning signal about disease outbreaks. Now scientists and public health officials are listening in.

A British magazine about business and global politics seems an unlikely hit among American readers. But The Economist is defying expectations. It has doubled its readership in the U.S. since 1993.

A night spent with Dr. Arthur Kellerman at Atlanta's Grady Memorial Hospital reveals a lot about why patients spend hours waiting in emergency rooms. A combination of citywide shortages of hospital beds and uninsured patients can result in days-long backups.

Read and hear an exclusive, pre-release excerpt of Suzanne Collins' Catching Fire, the follow-up to last year's young adult best-seller The Hunger Games.

He has been the Speaker of the House for more sessions of Congress than any previous Republican, but Rep. Dennis Hastert is far from a household name. One reason is that Rep. Tom DeLay called a lot of the shots. But another is that Hastert has been loath to cross swords with anyone -- until now.

Former Pennsylvania Sen. Rick Santorum is looking for momentum as Republicans caucus and vote in three states on Tuesday: Missouri, Minnesota and Colorado. And dissatisfaction with front-runner Mitt Romney in Missouri could point to a potential opportunity for President Obama in the fall.

Nevada has the lowest high school graduation rate in the country. But now a multi-million dollar federal grant is helping one district turn its schools around. Host Michel Martin speaks with a principal who spent last Saturday knocking on the doors of students who dropped out, encouraging them to come back to school.

A U.N. report on the assassination of former Lebanese Prime Minister Rafik Hariri implicates Syria in his death and raises more dark questions about Syrian involvement in Lebanon.

Geologists and other scientists warn that unless the wetlands that buffer New Orleans are rebuilt soon, the new New Orleans will get flooded again. At the same time, confusion surrounds exactly what should be done or how long it will take or cost.

President Bush was on the road Wednesday touting the $2.77 trillion budget he sent to Congress this week. The president found a receptive audience of business leaders in Manchester, N.H. But an independent survey of state voters at the end of December put Mr. Bush's approval rating at 36 percent.

The reviewer offers summer reading options, including fiction, poetry and short-story collections. He suggests titles from Jane Alison, Arthur C. Clarke, William Carlos Williams and more.

Physicists are building a particle accelerator that will smash subatomic particles together with tremendous force. What they find may solve some fundamental mysteries about how the universe is constructed — IF everything works.