https://apnews.com/article/russia-missile-nuclear-test-launch-drills-burevestnik-dd6a424d6c545ad42848416b77e93619

@mods this question asks about launching. Russia did exactly that: launched a nuclear weapon.

The question does not require offensive purpose of the launch.

@Henry38hw worth keeping an eye on. I'm still not convinced this was a nuclear weapon, as a nuclear weapon must have a nuclear payload, and while the Burevestnik platform is nuclear-capable I'm not seeing any indications (yet) that this test was nuclear-armed