The F-35 Joint Strike Fighter is an American fighter jet, but being an American fighter jet doesn’t mean it is fully American. Take a closer peak at the F-35, and one can find the fingerprints of many US allies in it. For example, the British supply many components (especially for the F-35B variant). Even Turkey supplied components for the jet before the US kicked Turkey out of the program. Not all jets are assembled in the US; Japan is assembling their F-35As in Japan, while many Europeans assemble theirs in Europe with final check out in Italy.