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Some people who don't have celiac disease say they feel better on a gluten-free diet. Researchers have long been puzzled as to why. A study suggests it could be because of a protein called zonulin.

Airs Friday, Dec. 25, 2015 at 9 p.m. on KPBS TV

Former Maryland Gov. O'Malley won cheers referring to "that immigrant-bashing carnival barker Donald Trump," and adding "the symbol of America is the Statue of Liberty, not a barbed-wire fence."

A force of some 7,000 Kurds has wrested control of Sinjar from ISIS, ending in a few days an occupation that had lasted 15 months.

Although policy differences were aired and some of the questions from the moderators could be called probing, gone was the slightly contemptuous tone heard in earlier debates — especially on CNBC.

The magazine said it is making the change as a result of competition from the Internet.

The president of the European Union is calling on countries to welcome their share of what the U.N. predicts will be at least 850,000 migrants over the next two years.

Finance ministers for the 19-nation common currency union approved the first tranche of an 86 billion euro package, the third such emergency deal in five years.

California closed an ugly chapter in its financial history on Wednesday by making its final payment on $14.2 billion in costly borrowing that plugged a budget deficit 11 years ago but eventually cost taxpayers about $5 billion in interest and fees.

Since Jan. 1, French officials have intercepted more than 37,000 migrants who were hoping to jump on trains or trucks heading to Britain via the Channel Tunnel.