This time it’s a design to commenmorate the crash of flight 93 in a Pennsylvania field. “The debates suggest an age-of-terror version of the fights over identity politics, provocative artworks and the Western canon that flared up 20 years ago. In the case of Flight 93, the Hallmark-card Minimalism that is now the lingua franca for memorials — and the design world’s version of political correctness — has clashed with the notion that what we ought to remember about its passengers, above all else, is their onboard rebellion.”