ukraine's resistance in this war, which would in us live on skype from pittsburgh, pennsylvania is collin clark is a senior research fellow at the su fan group that's a non partisan strategy center. and so with mario pulled now fallen, calling them in. how significant is this militarily and is this a much needed strategic when for russian forces, do you think? well, i think it is because the russians been, it have been on their back foot since this conflict started nearly 3 months ago. everybody's seen the really poor russian military performance from logistics to concentrate in combined arms. this is been a major surprise and disappointment, certainly for the kremlin. and finally, they've been able to claim a victory. and i think it is, it is important. i would say it's more tactical than it is strategic. but nonetheless, russia farley puts one in the win column after 3 months. yeah. and caught, and so what does the full of mario, pl mean then for ukraine, if russia cuts off it's access to the see of as of and potentially further south the black sea. it's a, it's a big deal. i mean, you know,