(FILES) Then Russian opposition leader Alexei Navalny and his wife Yulia sit in a Pobeda airlines plane heading to Moscow before take-off from Berlin Brandenburg Airport (BER) in Schoenefeld, southeast of Berlin, on January 17, 2021. The "murder" of late Russian opposition politician Alexei Navalny in an Arctic prison in 2024 is now a "science-proven fact", his widow Yulia Navalnaya said on February 14, 2026 after five European countries said Moscow used a lethal toxic on the Kremlin opponent. (Photo by Kirill KUDRYAVTSEV / AFP via Getty Images)