The Aerojet Rocketdyne former Pratt & Whitney/Rocketdyne/North America plant in Woodland Hills, CA (about 25 miles from Los Angeles) is closed now. They had a Saturn F1 engine out front for decades. The plant is to be torn down soon for apartments and some shops. I guess they will make the new RS-25 engines elsewhere.
https://en.wikipedia.org/wiki/Rocketdyne_F-1#/media/File:Pratt_%26_Whitney_Rocketdyne_Division.JPG
The F1 engine was first made around 1955 and here we are 60 years later playing catch up.
