It's plausible that the US did it. I don't think it's likely, but it's plausible.
I think it was Russia. They've made blunder after blunder strategically, and this would be par for the course.
Plus, as someone mentioned a page or two back, if someone other than Russia did it, the Russians would be screaming from the rooftops and would take the nuclear sabre rattling to the next level.
|