WASHINGTON (AP) — President Donald Trump said Wednesday he is considering buying used Boeing aircraft — perhaps from an overseas seller — to use as Air Force One when he’s aboard, as he fumes over the U.S. plane-maker’s delays in producing two specially modified ones for presidential use.

Air Force One is a modified Boeing 747. Two exist and the president flies on both of the more than 30-year-old planes. Boeing has the contract to produce updated versions, but delivery has been delayed while the aircraft maker has lost billions of dollars on the project.