Russia verifying whether it killed is leader in airstrike

I think there may be some confusion here.

To clarify, there is no credible evidence to suggest that Russia has killed its leader in an airstrike. In fact, the current leader of Russia is Vladimir Putin, who has been in power since 2012. He is still alive and active in politics.

It's possible that you may be referring to a different incident or a false report. If you could provide more context or clarify what you're referring to, I'd be happy to help you verify the information.