Iran tightens security for its scientists.

Transcripts of radio conversations between the shipwrecked captain and the Italian authorities have been released.

One Million Strong — More than a million signatures have been turned in on petitions to recall Wisconsin Gov. Scott Walker.

Mitt Romney thinks his tax rate is about 15%.

The U.S. is banning the import of certain snakes, including the Burmese python, that have invaded the Everglades.

Florida is unlikely to ban guns in hospitals.

Seattle braces for a major snowstorm.