text:  The man identified as the shooter in Saturday's assassination attempt on former President Trump came from Bethel Park, Pennsylvania. NPR's Dave Mistich went there over the weekend and joins us this morning. Dave, hi. Hi. I guess we should say up front what we're not going to learn, at least at this moment, and that is a motive for this shooter, and that is not unusual in these high-profile shootings. It's a senseless act, and it sometimes is difficult or impossible. But with that caveat, what have you learned about Thomas Matthew Crook?