Burevestnik Test Sparks Concerns Over Nuclear Threat
Russia's general staff confirmed Burevestnik missile flew 14,000 km for 15 hours.
US institutions found Russia preparing to test nuclear-armed cruise missile at Pankovo.
Russia's test framed as nuclear warning to NATO amid stalled Trump summit.
Skepticism over Burevestnik after 2019 accident killed 7 and raised environmental risks.
1 week ago