Ukraine has achieved “a lot” in its Kursk offensive into Russia but it’s hard to say how the situation will develop next, NATO Secretary General Jens Stoltenberg told reporters in Oslo on Thursday.“Only the Ukrainians can make the difficult choices that are needed, such as where to deploy their forces and what type of warfare is appropriate in this situation,” Stoltenberg said.For the latest updates on the Russia-Ukraine war, visit our dedicated page.Russian forces are advancing in the east of Ukraine while Ukrainian troops have made a bold incursion into Russia’s Kursk region, where it on Aug. 6 launched the biggest foreign attack on Russia since World War Two.Stoltenberg said Ukraine has the right to self-defense, including with long-range missiles that can reach military targets on Russian territory.“I am glad that many NATO countries have given that opportunity, and those that still have restrictions have softened the restrictions so that Ukraine can defend itself,” Stoltenberg