In a dramatic turn of diplomatic tides, Turkish President Recep Tayyip Erdoğan recently declared that U.S. sanctions on Turkey’s defense industry are beginning to ease—thanks to renewed relations with President Donald Trump.

For years, U.S.-Turkey relations were strained by Ankara’s controversial purchase of the Russian-made S-400 missile system. The move triggered tough penalties under the Countering America’s Adversaries Through Sanctions Act (CAATSA) and Turkey’s expulsion from the F-35 fighter jet program.

But now, a new chapter is being written.