The investigation into a January midair collision that killed 67 people near Washington, D.C., revealed an alarming number of ...

Scientists said the storm's strength and potential for far-reaching impacts is notable, but its timing isn't unusual.

For years, Washington, D.C., was insulated from many of the economic forces that decimated many older U.S. cities. Now, as ...

But the Tidal Basin isn’t the only place to see cherry blossoms. More than 9,000 cherry trees line streets, parks and other ...