Hehe that was a crazy Stuka airstrike indeed. I'm not even sure how much damage it did (Fog of War). But when I came back I saw an abandoned IS-2
The IS-2 still can't penetrate the frontal armor of the heavier German tanks. I guess the Soviets just have to use a good combined force (ATG's, AT nades, IS-2 and some arty/airstrike) to take on the German heavy tanks.