headlines: Ukraine steps up attacks on key Russian targets in the south.
articles: “Ukraine and its Western partners may have a narrowing window of opportunity to support a Ukrainian counteroffensive into occupied Ukrainian territory before the Kremlin annexes that territory,” said the spokesman, John Kirby.
  
  Since April, Ukrainian forces have effectively been locked into a defensive posture as they gradually retreated from an onslaught of Russian artillery in the eastern Donbas region. The Russians have not seized new territory in weeks, and the Ukrainians say their defensive positions have stabilized.
  
  But the purpose of the longer-range missile systems that Ukraine has been pleading for, and that Western countries have increasingly started to supply to its government, is not just to forestall Russia’s advance, but also to win back lost territory.
  
  “We all strive to liberate Ukraine from the enemy,” the spokeswoman for Ukraine’s southern forces, Natalia Humeniuk, said on Tuesday. “We have a single goal.”