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Blood pressure is a fundamental data point when evaluating risk of cardiovascular disease. But a new study finds that even small missteps in how these readings are taken can skew the results.

The giant storm formed over abnormally warm water in the Pacific. And sea level rise makes storm surge even more dangerous to residents of Guam and the Mariana Islands.

It's hard to imagine a piece of clothing that's more wrapped up in American history and mythology than blue jeans. They were invented 150 years ago.

The White House hasn't announced any such plans. But Obama will be in Japan next month and a visit would be a grand symbolic gesture in keeping with his emphasis on nuclear nonproliferation.

Five candidates are vying to replace the president, and more than 45,000 candidates are contesting 18,000 national, congressional and local elections. Officials are looking for fraud and violence.

A respected Pakistani journalist is forbidden from traveling outside the country as punishment for writing a story about tensions between the military and the elected government.

More than 90 percent of voters rejected any future plans for permanent resettlement of noncitizens. But not enough people voted — and some of those who did cast intentionally botched ballots.

Early indications are that Black Friday will be healthy for retailers, But analysts say the Black Friday fever has broken. Almost all the growth in holiday retail sales are in online and mobile shopping. One in six holiday dollars will be spent online giving consumers more bargaining power.

The asteroid smashed into Earth. And from miles under the Earth's surface, rock hurtled upward to a height twice that of Mount Everest and then collapsed outward to form a ring of mountains.

Vice President Mike Pence and Defense Secretary James Mattis talked at the Munich Security Conference this week. They reinforced the U.S. commitment to NATO and asked other countries to spend more.