A preliminary analysis concluded that Russia hit Kyiv last week with the hypersonic Zircon missile‚ its first use in the nearly two-year-old war‚ the head of a Kyiv research institute said on Monday‚ presenting a new challenge to Ukraine's air defences. Oleksandr Ruvin‚ director of the Kyiv Scientific-Research Institute for Forensic Examinations‚ said on his Telegram channel that his institute completed a preliminary analysis of missile fragments from a Russian attack on Feb. 7. He...