Trump Says More U.S. Casualties Are ‘Likely’ in War With Iran, and Oil Prices Jump After Attack

Plus, what to know about the A.I. videos that kids are watching. Here’s what we’re covering: Trump Says War Could Last Weeks and Offers Contradictory Visions of New Regime, by Zolan Kanno-Youngs, David E. Sanger and Tyler Pager F.B.I. Investigates Whether Texas Bar Shooting Was Act of Terror, by Pooja Salhotra, Sonia A.