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While a new U.S. intelligence report has found that Iran suspended efforts to build a nuclear weapon in 2003, experts say a big a part of the program remains intact: Iran is enriching uranium for fuel. But how efficient is the Iranian system?

Health officials are pushing to expand their use of the Internet to educate the public about an H1N1 flu epidemic, as they prepare to fight what's been called a "serious health threat" with tweets, blogs and posts on Facebook and MySpace.

The season of pleasure reading is upon us, and the publishing world has readied a handful of thrilling titles to be released just in time for the summer heat. After surveying the crop, here are our picks for fun reading in the sun.

Terminator Salvation Honors Franchise Says Teen Critic

As federal health agencies launch a big campaign to convince more Americans to get flu shots, new data from the Centers for Disease Control and Prevention and outside analysts indicate this pandemic is much milder than officials expected or have let on so far.

Researchers had the rare chance to learn more about how speech works by testing patients with electrodes embedded in their brain. The study found it takes the brain less than half a second to cue up what the mouth is about to say.

Michele Norris talks with Fred Weir, a correspondent for the Christian Science Monitor, who is based in Moscow, about the Russian public's reaction to news of Alexander Litvinenko's death. Weir says most of the Russian public actually doesn't even know about the case, because the big Russian media outlets are not carrying the story. Weir also points out that although Litvinenko publicly blamed Russian President Vladimir Putin for his poisoning, Litvinenko lived in a shady world, and there were plenty of others who might have wanted him dead.

A new UC San Diego study claims global warming will lead to biodiversity loss and glacial melt. The lead author believes the Earth will warm more than two-degrees Celsius even if humans take steps to

Americans are increasingly using hand-held devices to access the Internet and for texting, sending e-mails, playing music and instant messaging. A large number of those hyperusers are young Latinos and blacks, who crave the convenience of staying connected wherever they go.

A look at the missing Mars Global Surveyor and new evidence of water on Mars.