Over the weekend, Ukraine\u2019s military stunned the world. After months of a kind of stalemate, its military took hundreds of miles of territory back from Russia \u2014 its biggest victory since the start of the war.\n\nHow did the war reach this critical point, and what does Ukraine\u2019s success mean for the future?\n\nGuest: Eric Schmitt, a correspondent covering national security for The New York Times.