At 20 airports in the United States, security screening is handled not by the Transportation Security Administration, but by private companies — and their checkpoints aren’t seeing long lines.

A critically ill 33-year-old man survived an almost unimaginable scenario—living for 48 hours without lungs—thanks to a groundbreaking surgical approach. After a severe flu-triggered infection ...

The US Army has sent 10,000 interceptor drones developed in Ukraine to the Middle East as it looks to repel Iranian attacks without using up high-cost missile defenses, according to US Army Secretary ...