(h/t @npub1gsas...q4wj). I won't try to summarize the article; read it yourself. But we have a combination of an AI failure (the phone decided that it was Hughes' phone number), a UI failure (the phone did not make it crystal clear whose contact information was being updated, a user error (Waltz didn't read the phone screen carefully enough because of the second error), a technology problem (there's no official secure text message system, a policy issue (picking Signal even though it lacks important features to secure such exchanges), etc. To quote myself, "complex systems fail in complex ways."
During the Vietnam War years, there was a chant at protests: “Hey, hey, LBJ / How many kids did you kill today?” Now, we can substitute "RFK" for “LBJ”.