Video: Tower rollback prior to launch of Mars Pathfinder atop a Delta 2

NOAA’s JPSS 1 weather satellite is enshrouded inside the nose fairing of a Delta 2 rocket, awaiting liftoff from Vandenberg Air Force Base in California on a seven-year mission to collect data to improve global weather forecasts.

For the second consecutive day, SpaceX called off a Falcon 9 launch attempt at Cape Canaveral on Thursday evening, this time to complete a software update on the first 60 satellites for the company’s Starlink network to provide high-speed Internet service from orbit.

Mars Pathfinder Mission Director Tony Spear narrates a video describing the launch preparations for the Mars Pathfinder spacecraft and the Sojourner rover.