Russian President Vladimir Putin‘s decision to boast about new tests of nuclear-capable weapons systems this week is his latest strategic effort designed to dissuade Western support for Ukraine.

Putin called the 9M730 Burevestnik missile, which is a nuclear-powered cruise missile, “a unique weapon that no other country possesses,” while the chief of the general staff of Russia’s armed forces, Valery Gerasimov, said it flew more than 8,600 miles during a 15-hour test flight on Oct. 21.