Video: Groundbreaking for commercial crew access tower

Ground crews at Vandenberg Air Force Base in California raised a United Launch Alliance Atlas 5 rocket on its launch pad earlier this month in preparation for liftoff May 5 with NASA’s InSight lander heading to Mars.

The press conference on Tuesday, scheduled to begin at 2 p.m. EDT (1800 UTC), is the first major update from NASA since Administrator Jared Isaacman unveiled the project in late March.

The launch of a Boeing-built Mexican communications satellite on a Proton rocket has been postponed after engineers discovered an anomaly on a similar spacecraft.