Russia rattles nuclear saber after U.S. missiles fired by Ukraine

President Vladimir Putin on Tuesday formally lowered the threshold for Russia’s use of its nuclear weapons, a move that follows U.S. President Joe Biden’s decision to let Ukraine strike targets inside Russian territory with American-supplied longer-range missiles. Moscow says Ukraine fired six American-supplied longer-range missiles at Russia’s Bryansk region. It marks Kyiv’s first use of the weapons inside Russia in 1,000 days of war. We talk about it with Doug Klain, nonresident fellow at...