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RENEE MONTAGNE, HOST:

To talk more about those opponents and what's happening on the campaign trail, we turn now to NPR's Cokie Roberts, who joins us most Mondays. Good morning, Cokie.

COKIE ROBERTS, BYLINE: Hi, Renee.

MONTAGNE: So let's - it looks like there's one less rival in the Republican contest, now that former Utah Governor Jon Huntsman is expected to drop out today and throw his support to Mitt Romney. Let's talk about the likely effect on the rest of the contenders.

Scientists do experiments with millions of rats and mice each year, to study everything from heart disease to cancer to diabetes. Recently, some new recommendations about how to house female lab rodents and their babies caused an uproar, with experts at major research institutions now saying they're unsure of what they'll have to do to keep their government funding.

Austerity measures imposed by international lenders in exchange for billions in bailout loans have cut deeply into Greek pockets. If Greece defaults on its massive sovereign debt, it may be forced to leave the Eurozone.

Everyone has nightmares sometimes. But for people with PTSD, it's different.

Sam Brace doesn't want to talk about what he saw when he was a soldier in Iraq eight years ago. In fact, it's something he's actively trying not to dwell on. But what he can't control are his dreams.