US ‘disturbed’ by Russia’s plan to reverse nuclear test ban ratification

People look at a replica of the Soviet Union-era AN-602, or Tsar Bomb, the most powerful nuclear bomb ever detonated, seen here on display in Moscow, Russia, in 2015 [File: Pavel Golovkin/AP Photo]

The United States said it was “disturbed” by a Russian envoy’s announcement that Moscow will reverse its ratification of a 1996 treaty that banned the testing of nuclear weapons.

Russia’s envoy to the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO), Mikhail Ulyanov, said on Friday that Moscow will revoke its ratification of the pact.