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Ben Carson backtracks on Muslim remarks

Republican presidential candidate Ben Carson is trying to calm the uproar he sparked with controversial remarks about a Muslim serving as president. CNN's Joe Johns reports.
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Is North Korea preparing nuke test?

U.S. and United Nations officials say there is new concern over the possible expansion of North Korea's nuclear weapons program. CNN's Brian Todd reports.
Hillary Clinton greets people following a Reception for New Hampshire Organized Labor Community and Allies event September 5, 2015 in Manchester, New Hampshire. (Photo by Darren McCollester/Getty Images)

Hillary Clinton on emails: 'I'm sorry'

Democratic presidential front-runner Hillary Clinton said she is "sorry" for using a private email server, going further than ever before to express remorse.
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Migrants are facing desperation and death

As hundreds of thousands of people, many from the Middle East, try to find sanctuary from war, civil strife and terror, some countries are trying to close their gates.
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Is Russia selling missiles to Iran?

The Pentagon says the U.S. has options to deal with Russia as the country moves forward with the sale of an advanced air defense missile system to Iran. CNN's Barbara Starr reports.