This is the best summary I could come up with:

The test, which was conducted in a tunnel of the Nevada National Security Site (NNSS), used chemicals, high-explosives and radiotracers to “validate new predictive explosion models,” the department said.

The Comprehensive Nuclear Test Ban Treaty was adopted in 1996 by the United Nations General Assembly.

Russian President Vladimir Putin first announced on October 5 that Russia may abandon the nuclear test ban treaty.

On Tuesday, Duma Speaker Vyacheslav Volodin said on his Telegram channel that Moscow was withdrawing from the treaty because of the “irresponsible attitude” of the U.S. to global security.

“In the interests of ensuring the security of our country, we are withdrawing the ratification of the Comprehensive Nuclear Test Ban Treaty,” said Volodin, adding that while Moscow had ratified the nuclear test ban treaty in 2000, Washington had failed to do so because of its “irresponsible attitude to global security issues.”

Last month, Mikhail Kovalchuk, an ally of the Russian president, proposed that Moscow test its nuclear weapons at a nuclear test site in Novaya Zemlya, an Arctic Ocean archipelago, “at least once” to scare the West.

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