A few years ago, Air France told the National Air and Space Museum in Washington that it would consider donating a Concorde when the aircraft's flying days were over. Those days may have come. Last week British Airways and Air France, the only two airlines that operate the 12 remaining supersonic Concordes, were forced by British and French regulators to ground their planes. And given the expensive measures likely to be required to prove its flightworthiness, the plane may never fly in regular service again.
The Concorde's grounding came after British and French authorities investigating the July 25 crash of Air...