Artemis 2 moon rocket now has all 4 powerful engines on board (photo) 

 The Artemis 2 moon rocket's core stage now has all four of its RS-25 engines mounted in place. It's a big milestone for the mission as it sails toward a launch in late 2024. 

https://cdn.mos.cms.futurecdn.net/TijHKyXaiT6r39pr9evwAh.jpg

https://www.space.com/artemis-2-moon-mission-space-launch-system-engines-core-stage