Northrop Grumman working with SpaceX on US spy satellite system

Aerospace and defence company Northrop Grumman is working with SpaceX, the space venture of billionaire entrepreneur Elon Musk, on a classified spy satellite project already capturing high-resolution imagery of the Earth, according to people familiar with the program.

The program, details of which were first reported by Reuters last month, is meant to enhance the US government’s…