Using radio traffic, flight data and leaked footage of an air traffic control radar screen, we examine what was happening in the moments before the midair collision near Reagan National Airport that l...

Here’s why it’s hard to distinguish objects in the night sky.

Satellite images from last week and this week show that naval vessels docked at the port city of Tartus have left. According to marine tracking data, no cargo ships have entered or left Tartus since M...

In recent months, soldiers have demolished more than 600 buildings to create a buffer area and expanded a network of bases, a New York Times analysis of satellite imagery and video footage shows.

1970s-era U.S. spy satellite imagery has led archeologists to what they believe is the site of a seventh-century battle that was decisive in the spread of Islam in the region.