Since shortly after the dawn of the jet age, the world has followed America¡¯s lead on aviation safety.

Now, in a remarkable rebuke, nations from the U.K. to Australia have rejected public reassurances from the U.S. Federal Aviation Administration and grounded Boeing¡¯s 737 Max 8. They have not only told their carriers not to fly the jets, they have in some cases prohibited the plane from flying through their airspace.

¡°I¡¯m watching this unfold with an element of astonishment and bemusement,¡± said Sandy Morris, an aerospace analyst at Jefferies International in London. ¡°What we¡¯re looking at here is almost a rebellion against the FAA. It¡¯s the first time I¡¯ve ever seen this happen.¡±