Ukrainian forces are relentlessly targeting Russian supply lines, both overland routes and bridges, around occupied Crimea with drones. Russian forces are, in turn, throwing up smoke screens to shield a key bridge from attack, new satellite images provided by commercial satellite imagery company Vantor show.Along the front lines, Ukraine has been increasingly using mid-range strike drones to implement a lockdown on Russian logistics. That growing logistics pressure extends to the Crimean peninsula, putting supply channels…