Reports Ukraine could soon be unable to properly use its US-supplied F-16 fighter jets have left Europeans concerned the same could happen to them

Summary

European nations refute claims that the U.S. has a “kill switch” for F-35 fighter jets, despite concerns raised after Trump suspended military aid and intelligence support to Ukraine.

While no evidence confirms such a switch, experts warn the U.S. could limit access to crucial software updates.

Belgium and Switzerland assert their F-35s remain autonomous but acknowledge reliance on U.S. data systems.

Set to receive 35 F-35s in 2026, some German politicians are questioning whether the purchase should have been made amid these concerns.