The heads of the CIA and Britain’s spy service said in an op-ed on Saturday that “staying the course” in backing Ukraine’s fight against Russia was more important than ever as they warned that the world order was “under threat in a way we haven’t seen since the Cold War”. The heads of the British and American foreign intelligence agencies said Saturday that Ukraine’s surprise incursion into Russia is a significant achievement that could change the narrative of the grinding 2 1/2-year war, as they urged Kyiv’s allies not to be held back by Russian threats of escalation Richard Moore, the head of MI6, said Kyiv’s surprise August offensive to seize territory in Russia’s Kursk region was “typically audacious and bold on the part of the Ukrainians, to try and change the game.” He said the offensive – which Ukraine said has captured about 1,300 square kilometers (500 square miles) of Russian territory – had “brought the war home to ordinary Russians.” Speaking alongside Moore at an unprecedented joint public event in London, CIA Director William Burns said the offensive was a “significant tactical achievement” that had exposed vulnerabilities in the Russian military. It has yet to be seen whether Ukraine can turn the gains into a long-term advantage. So far the offensive has not drawn Russian President Vladimir Putin’s focus away from eastern Ukraine, where his forces are closing in on the strategically situated city of Pokrovsk. Ukrainian President Volodymyr Zelensky has repeatedly pressed allies to let Kyiv use Western-supplied missiles to strike deep inside Russia and hit sites from which Moscow launches aerial attacks. While some countries, including Britain, are thought to tacitly support the idea, others including Germany and the US are reluctant. US President Joe Biden has allowed Ukraine to fire US-provided missiles into Russia in self-defense, but the distance has been largely limited to cross-border targets deemed a direct threat, out of concerns about further escalating the conflict. Burns said the West should be “mindful” of the escalation risk but not be “unnecessarily intimidated” by Russian saber-rattling, revealing that there was a moment in late 2022 when there was a “genuine risk of the use of tactical nuclear weapons” by Moscow. He also warned of the growing and “troubling” defense relationship between Russia, China, Iran and North Korea that he said threatens both Ukraine and Western allies in the Middle East. North Korea has sent ammunition and missiles to Russia to use against Ukraine, while Iran supplies Moscow with attack drones.