The White House on Thursday said President Trump’s decision to switch from the new Qatari-donated Air Force One back to the original presidential aircraft for his flight home from Turkey on Wednesday was a deliberate security tactic rather than a response to any specific threat.

White House Communications Director Steven Cheung said the new plane is fully equipped with advanced security systems designed to protect the president and his staff, and that the administration uses every tool available, including distraction and misdirection, to counter threats against Trump.

The explanation came after Trump said Thursday that he is at the top of Iran’s “kill list,” a claim he made shortly before boarding the older Air Force One for the return trip to the U.S. from the NATO summit in Turkey.

The White House did not say whether any specific intelligence prompted the switch, and officials continued to deny that physical security concerns were behind the decision.