In an emotional news conference, South Carolina Gov. Mark Sanford says he's been cheating on his wife with a woman from Argentina and that he'll step down as head of the Republican Governors Association. The stunning revelation comes as the father of four returned from a secretive trip to the South American country today.

There are report of violence erupting around Iran parliament with protesters and riot police clashing in the streets. Although it can't be verified because of the media ban in Iran, amateur video posted on YouTube apparently shows people chanting, pushing barricades and throwing rocks during a protest in Tehran.

New data from the Environmental Protection Agency finds that there are millions of Americans living in nearly 600 neighborhoods where the air pollution puts them at a much higher risk for getting cancer.

The nationwide search for 4-year-old Haylee Donathan ends with a raid on a communal farm in rural southern California. Authorities find the Ohio girl with her mother and her mother's boyfriend, a registered sex offender who escaped a half-way house.

Incredible footage from Turkey shows a 4-year-old boy walking away unscathed after an out-of-control car knocks him down a flight of stairs.