Along the Russia-Ukraine border, badly stretched Ukrainian forces are struggling to deny Russia a foothold. The town of Vovchansk, three miles inside the border, has seen some of the fiercest fighting since Russia launched its offensive in 2022. John Ray of Independent Television News joined soldiers from Ukraine's 57th Brigade there and has this report from the front line. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders