NASA responded to news that Boeing aims to lay off up to 400 workers from its Space Launch System program. The SLS rocket plays a key role in the Artemis moon program, the agency said.

Boeing informed its employees working on NASA's Artemis program that it was preparing for as many as 400 layoffs connected to the giant rocket under development amid possible shakeups to the country's return-to-the-moon initiative, the company said.

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.