I gave Chris atomic fuel from the rocket souvenirs in Novac and gave him the parts from Old Lady Gibson. When I told him to start the launch and watched from the viewing area, Jason Bright gave a speech and all the ghouls kept bumping into each other saying "hi".

Read the quest notes. There should be another step to the quest.

There is no issue, you need to do something in another location.

If you need a hint, think back to where you first talked to Ghoul up in the Warehouse.

Haha I feel so silly! Thank you for letting me know!