Turkey will activate as planned S-400 missile defense systems acquired from Russia, once the relevant military personnel complete their training, the Turkish national defense minister said Thursday.

Training efforts were ongoing on the operation of the missile defense hardware, Hulusi Akar told lawmakers in the Turkish parliament’s planning and budget committee.

“After this process is completed, we will conduct our planned activities [on S-400s].”

Turkey’s acquisition of the advanced Russian S-400 air-defense system prompted Washington to remove Turkey from the F-35 fifth-generation joint strike fighter program in July.

Read more: Turkey to activate S-400 missile defense systems