I just want to say that Delta's response to a request for documented expenses due to their operational failure was very prompt and fair. The amount of inconvenience, stress and disruption was unlike anything I have experienced in decades of flying. It was, and still is, surprising and disappointing that their technical infrastructure was so poor that it could not handle calls from crew, leading to a national meltdown that caused millions of dollars of collateral damage to their passengers. Nevertheless, their response to restitution for the direct expenses was admirable and superior to that of most American corporations.