"Training will continue," Summers said during a press briefing.
The statement comes several days after the Pentagon announced that the United States suspended its deliveries and activities with Turkey on F-35 operational capabilities over Ankara's decision to procure the S-400 defence systems from Russia.
Responding to the US move, Turkish Foreign Minister Mevlut Cavusoglu said on sidelines of the NATO summit in Washington DC that he would tell US Security Adviser John Bolton and US Secretary of State Mike Pompeo that its purchase of the air defence system that the purchase of Russian S-400 systems is "definitely a done deal."
The S-400 is Russia's next-generation mobile surface-to-air missile system and can carry three different types of missiles capable of destroying aerial targets at a short-to-extremely-long range. The weapon is created to track and destroy various types of aerial targets varying from reconnaissance aircraft to ballistic missiles.