Amazing feat of engineering. NASA can be proud of achieving something that no other space agency could do. It took courage to keep shovelling money and effort into this project and some amazing science to get it deployed into space.
NASA, ESA and CSA have collaborated on the telescope since 1996. [...] ESA is providing the NIRSpec instrument, the Optical Bench Assembly of the MIRI instrument, an Ariane 5 ECA launcher, and manpower to support operations. The CSA will provide the Fine Guidance Sensor and the Near-Infrared Imager Slitless Spectrograph plus manpower to support operations.
Several thousand scientists, engineers, and technicians spanning 15 countries have contributed to the build, test and integration of the JWST. A total of 258 companies, government agencies, and academic institutions are participating in the pre-launch project; 142 from the United States, 104 from 12 European countries, and 12 from Canada. Other countries as NASA partners, such as Australia, have or will be involved in post-launch operation.
I'm European btw.