The Trump administration notified Congress on June 24 that it intends to sell more than $700 million worth of GE Aerospace F-110 engines to Turkey, enough to power roughly 80 units for Ankara’s indigenous KAAN fighter program. Congress now has a narrow, fifteen-day statutory window to introduce a joint resolution of disapproval. That window is closing, and it should be used. The case against the sale is not abstract. Turkey still operates the Russian-made S-400 air defense system it purchased in 2019 — the same purchase that got Ankara expelled from the F-35 program in the first place and triggered CAATSA sanctions that remain in effect today.