Stats: Delta 4 history and backlog (updated March 30)

Technicians around Cape Canaveral spent the last four weeks assembling a United Launch Alliance Atlas 5 rocket and preparing a Lockheed Martin-built NOAA weather satellite for liftoff March 1.

The nuclear power generator for NASA’s Perseverance rover has been installed on the spacecraft atop an Atlas 5 rocket at Cape Canaveral, and mission managers gave a green light Wednesday to continue preparations for the rover’s July 30 launch toward Mars.

Watch the pre-launch news conference held Monday, April 17 at NASA’s Kennedy Space Center to preview liftoff of the Orbital ATK commercial Cygnus OA-7 cargo ship aboard a United Launch Alliance Atlas 5 rocket for the International Space Station.