Pentagon testing mass surveillance balloons across the US
"The balloons are carrying hi-tech radars designed to simultaneously track many individual vehicles day or night, through any kind of weather. The tests, which have not previously been reported, received an FCC license to operate from mid-July until September, following similar flights licensed last year."
https://www.theguardian.com/us-news/2019/aug/02/pentagon-balloons-surveillance-midwest