The Trump administration has subpoenaed several New York Times journalists after their report on security concerns involving the new Air Force One, according to the paper.

“The appearance of federal law enforcement agents on the doorstep of news reporters should shock the conscience of any American who believes in the Constitution and the press freedom it protects,” David McCraw, a lawyer for the Times, said in a statement.

Trump flew the new Air Force One to a NATO summit in Turkey this week. But he departed Wednesday on one of the older-model Air Force One jets for Mildenhall, a Royal Air Force base in Suffolk, England. The newer plane also flew to Mildenhall. Trump then switched to that plane for the flight home to Joint Base Andrews.