US-designed, but partly Belgian-manufactured. These things are always political/economic horsetrading, and as part of the deal, Belgium got one of the F-16 production lines placed in Charleroi: https://en.wikipedia.org/wiki/General_Dynamics_F-16_Fighting...
Well, when the news is all about security and Chinese hacks and untrustworthy hardware I find it strange to rely 100% on foreign hardware for one's airforce.
Europe isn't an American colony. If anything it should be the other way round.