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The Food and Drug Administration is proposing that manufacturers of X-ray machines and CT scanners do more to protect children from radiation exposure. If companies don't take steps to limit X-ray doses, the agency may require a label on their new equipment recommending it not be used on children.

Mitt Romney's superPAC is spending upward of $4 million on TV ads in nine key swing states in its first major media buy of the general election. One ad emphasizes Romney's compassion and generosity. But some say it may overstate the importance of his actions in helping a colleague's daughter.

After years of "evolving" on the issue of gay marriage — and just days after his vice president embraced the idea — President Obama said Wednesday that he supports same-sex marriage. Melissa Block talks to Scott Horsley for more.

The president and his re-election team are clearly wagering that his support for same-sex marriage will attract more voters than it repels — and allow him to make the choice between himself and Mitt Romney even sharper.

Southern states like Florida and Texas scored the lowest on Pew's mobility index.

Muslim clerics in Afghanistan often denounce the U.S. military presence and speak favorably of the Taliban. The Afghan government is now calling on the clerics to be more moderate, or face penalties.

States are moving to set up health insurance exchanges — a pillar of Obama's health care law. But many GOP governors find themselves in an awkward position. David Wessel, economics editor of The Wall Street Journal, talks to Steve Inskeep about why the governors' positions on exchanges are complicated.

Hairstyling icon Vidal Sassoon has died at the age of 84. He first earned acclaim for creating hair cuts that needed little styling.

Among others ,the perfume has been represented in ads by Catherine Deneuve and Nicole Kidman. Brad Pitt is the first man to represent the scent.

Milwaukee Mayor Tom Barrett won the Democratic primary earlier this week, earning the chance to challenge Wisconsin Governor Scott Walker at the polls. Barrett lost a race for the governor's seat to Walker in 2010. Host Michel Martin speaks with Barrett about whether the outrage over Walker's cuts to collective bargaining rights will be enough for him to win this rematch.