US aerospace giant Boeing has announced plans to lay off around 400 employees from its Space Launch System (SLS) Moon rocket program. The decision comes as a result of changes in NASA's Artemis program and cost expectations.

The aerospace company, which is the primary contractor for the rocket's large core stage, issued the notifications as part of the Worker Adjustment and Retraining Notification (or WARN) Act, which requires US employers with 100 or more full-time employees to provide a 60-day notice in advance of mass layoffs or plant closings.