‘A Knife to the Throat’: Putin’s Logic for Invading Ukraine

At 10 p.m. in Moscow on Monday night, Russian state television interrupted its regular programming to air an address from President Vladimir V. Putin about the Ukraine crisis. We look back on what Mr. Putin’s hourlong speech — remarkable for his overt display of emotion and grievance — revealed about his rationale for invading. Guest: Anton Troianovski, the Moscow bureau chief for The New York Times.