National World News The U.S. has detected 4 other recent spy balloons. Why didn't we hear about them? 5:27pm February 06, 2023 by Greg Myre Share URL copied to clipboard! Play Pause There was an error loading the media player. Copyright 2023 NPR. To see more, visit https://www.npr.org. 300x250 Ad More All Things Considered Health & Safety How to make friends after a move by Janet W. Lee Health & Safety Author Emily Oster's new book 'Unexpected' tackles difficult pregnancies 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate