I like the object, and I like the vague little not-an-explanation-at-all that the unnamed person of interest provides in the interview log. There are some confusing bits, though.
The places where black boxes are used in place of numbers (e.g. "DNA from over ██████ individuals") are ambiguous- the length of the boxes makes it unclear whether they're covering very large numbers written with digits ("DNA from over 100000 individuals") or smaller numbers written in words ("DNA from over twenty individuals"). Based on the use of black boxes with numbers elsewhere in the article (e.g. "date of ██/██/2007") I'm inclined to think they're digits… but I feel like a mass suicide in the hundreds of thousands would have been worldwide news, especially if the Foundation had no reason to cover it up at the time.
Also, the Foundation seems to be behaving oddly toward the end. Why does Hamlin never ask what Greenflight was a subdivision of? If Greenflight was only one part of something larger, and Greenflight made 2198, I would think the Foundation would want to investigate the hell out of that larger thing. Am I missing something obvious here?
If the Foundation hasn't found any other Greenflight documentation, is the surviving population a group they've identified from DNA analysis, or is that fact purely inferred from the unnamed participant's testimony? Either way, how are they planning on contacting these people from (at best) samples of their DNA?
If there are still Greenflight survivors out there, and that's enough evidence to keep the phenomenon listed as Euclid and task satellites just in case it shows up again, why has the Foundation stopped trying to figure out what Greenflight was?