The scale of China’s balloon surveillance could be more extensive than a handful of flights over the U.S., as intelligence agencies sift through hundreds of sightings of unidentified balloons and ...

With the recent shootdowns of "high-altitude objects," there's heightened awareness about what's flying in U.S. airspace, especially weather balloons. As it turns out, the skies are crowded. PHOTO: An ...

Balloons have been in the news a lot in the last week after the U.S. military shot down a Chinese surveillance balloon over the Atlantic Ocean. That was followed by three other unidentified objects, ...