Ukraine fired long-range U.S. missiles inside Russia for the first time despite Moscow’s threats of retaliation. The attack hit an ammunition storage facility near the Russian city of Karachev and is the first such assault to use long-range, NATO-made arms. WSJ’s Alistair MacDonald explains why the Kremlin sees this as a major escalation.Chapters:0:00 Ukraine fired long-range missiles into Russia0:45 ATACMS and Storm Shadow2:28 New targets and logistics3:57 What’s next?