Images show Russia's new Sarmat missile suffered major test failure, researchers say

LONDON (Reuters) -Russia appears to have suffered a "catastrophic failure" in a test of its Sarmat missile, a key weapon in the modernisation of its nuclear arsenal, according to arms experts who have analysed satellite images of the launch site. The RS-28 Sarmat intercontinental ballistic missile is designed to deliver nuclear warheads to strike targets thousands of miles away in the United States or Europe, but its development has been dogged by delays and testing setbacks.