File: A SpaceX Falcon 9 rocket stands in the launch position during sunset at Space Launch Complex 4 East (SLC-4E) at Vandenberg Space Force Base in California. Image: SpaceX
America’s spy satellite agency, the National Reconnaissance Office (NRO), is preparing to launch its third mission in eight days. The launch on Sunday, April 20, will feature another batch of satellites to support its proliferated architecture constellation in low Earth orbit.

