During the year and a half in which the U.S. government separated thousands of children from their parents, the Trump administration’s explanations for what was happening were deeply confusing, and on many occasions—it was clear even then—patently untrue. I’m one of the many reporters who covered this story in real time. Despite the flurry of work that we produced to fill the void of information, we knew that the full truth about how our government had reached this point still eluded us.