Why the US military could replace spy satellites with solar planes

The US military has spent billions of dollars on spy satellites and supersonic surveillance aircraft, but now it seems to be focusing on slow, lightweight solar-powered planes to do the same job

Why the US military could replace spy satellites with solar planes
The US military has spent billions of dollars on spy satellites and supersonic surveillance aircraft, but now it seems to be focusing on slow, lightweight solar-powered planes to do the same job