New Hampshire holds its first-in-the-nation primary today, after Iowa?s caucuses last week.
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This year, scientists have recorded and observed galactic interactions, atmospheric phenomena and the first images of a black hole.
The couple, who have a boy named Archie, announced on Jan. 8 that they would step back from being royals, become financially independent, and split their time between North America and the United Kingdom.
A look at the presidents visits, speeches and meetings with dignitaries.