Turkish President Recep Tayyip Erdogan said that Turkey's deal with Russia on the supplies of S-400 missile systems "made the United States furious."
"Did we need to wait for you [the US]? We take and will continue to take all necessary measures to ensure our national security. We are the hosts in our own house," the Turkish leader emphasized.
He added that after the US and Israel had refused to supply combat drones to Turkey, Ankara developed and began to produce them itself, causing the two states' concern.
When asked whether Turkey's membership in NATO would become an obstacle to S-400 deliveries, the Kremlin aide said earlier that "each party undertakes commitments determining what it has the right to do with the delivered weapons, and what it cannot do.
The S-400 is Russia's next-generation air defense system. It carries three different types of missiles capable of destroying aerial targets at short-to-extremely-long ranges. It is designed to track and destroy various types of aerial targets, from reconnaissance aircraft to ballistic missiles.