[gre345t34]

The context is that US is developing high altitude balloons for detecting hyper-sonic weapons. Developing a technology and actively using in another country's airspace are quite different things, so it's not really that surprising that articles don't find it important to include.

[Jabbles]

They wouldn't tell us if they were, that information would almost certainly be highly classified.

Compare the balloons with this technology: https://en.wikipedia.org/wiki/Lockheed_SR-71_Blackbird#Opera...