Members of Congress express concern that Mr. Trump will pressure the Air Force to do the work so fast that sufficient security measures are not built into the plane. When asked last week, the Air Force said it simply could not discuss the cost " or anything else about the plane " because it's classified. (For collectors of such bureaucratic evasions, yes, the Air Force is willing to discuss the cost of building a new generation of intercontinental ballistic missiles, but not the cost of renovating the president's aircraft.)