CMS is on the cover of Newsweek, under a caption that reads “The Biggest Experiment Ever (And It’s European).” Interestingly enough, the part of CMS they picture is a muon endcap disk, which is a U.S. contribution*. In general, though, the LHC and the LHC experiments are mostly European.
(* FermiLab, Carnegie Mellon, Florida Tech, University of Florida, Northeastern, Northwestern, Ohio State, Purdue, Rice, Texas A&M, U.C. Davis, UCLA, U.C. Riverside, Wayne State, and Wisconsin.
My “Made in the U.S.A.” subject line isn’t exactly true: two of the four assembly sites were in China (IHEP) and Russia (PNPI). The Russian contribution was mostly on a different disk than the one shown.)