Russia Pushes Back at Ukraine’s Cross-Border Assault, but Kyiv Presses On; How did Ukrainian Troops Manage to Invade Russia?

How Ukrainian Troops Invaded Russia - The New York Times (nytimes.com)

Russia Pushes Back at Ukraine’s Cross-Border Assault, but Kyiv Presses On - The New York Times (nytimes.com)

Evidence Shows ‘Hand to Mouth’ Production of Russia’s Advanced Weapons - The New York Times (nytimes.com)

Ukrainian soldiers riding in an infantry fighting vehicle on Friday in the Sumy region, across the border from the area of Russia that Kyiv’s forces entered this week.Credit...Viacheslav Ratynskyi/Reuters