Moscow has been covertly helping Tehran develop supersonic cruise missiles capable of striking US aircraft carriers, in what analysts call one of the most significant transfers of strategic military technology between the two countries, the Financial Times reported. The multiyear effort, codenamed C430L, drew on some of Russia's most experienced missile engineers to help Iran master ramjet propulsion — technology that lets a cruise missile sustain flight at several times the speed of sound. The FT investigation, based on leaked correspondence, travel records and patent filings, found the program began in 2023 and continued through the US-Israeli war against Iran into 2026. Fabian Hinz, a senior analyst at Conflict Armament Research, called it the transfer of "highly strategically sensitive military technology" that Iran had sought for decades, adding that a program of this scale would have needed clearance from the top of the Russian government. Supersonic, low-flying cru...