US National Security adviser John Kirby confirmed Thursday evening that Russia is developing military capabilities for use against satellites in space but left the specific nature of the threat open. “While I’m limited by how much I can share about the specific nature of the threat, I can confirm that it is related to an anti-satellite capability that Russia is developing,” Kirby said. “I want to be clear about a couple of things right off the bat. First, this is not an active capability that’s been deployed. And though Russia’s pursuit of this particular capability is troubling, there is no i…