This is horrible frightening and amazingly interesting, all wrapped up into one. Project Angle Fire was a persistent surveillance system developed in Iraq that helped stem the tide of IED deaths. Then, of course, the developer is working to privatize it and bring it to the public sector. It's not new tech, but it's probably also gotten even better in the years since. It's worth a listen if you have time.
"In 2004, when casualties in Iraq were rising due to roadside bombs, Ross McNutt and his team came up with an idea. With a small plane and a 44 mega-pixel camera, they figured out how to watch an entire city all at once, all day long. Whenever a bomb detonated, they could zoom onto that spot and then, because this eye in the sky had been there all along, they could scroll back in time and see - literally see - who planted it."
https://www.wnycstudios.org/story/eye-sky
"In 2004, when casualties in Iraq were rising due to roadside bombs, Ross McNutt and his team came up with an idea. With a small plane and a 44 mega-pixel camera, they figured out how to watch an entire city all at once, all day long. Whenever a bomb detonated, they could zoom onto that spot and then, because this eye in the sky had been there all along, they could scroll back in time and see - literally see - who planted it."
https://www.wnycstudios.org/story/eye-sky