Ukraine's Main Directorate of Intelligence (HUR) has released video of its claimed sabotage operation against a Russian missile corvette on Sunday in the Baltic Sea exclave of Kaliningrad, which the intelligence service said had "disabled" the vessel. The footage purportedly showed a fire being set somewhere inside the Serpukhov Buyan-M class corvette, which is part of the Baltic Fleet and can be armed with either Kalibr or Oniks cruise missiles. The video also showed what were claimed to be blueprints of the vessel, presumably used by HUR operatives to plan the attack. The claimed HUR attack took place while the...