Stalin good job but keep on upgrading airpower remember the soviet union's general's were the first to truly understand that control over the air means dominance. keep up with your fighter's make sure there armed the best you can have extra armament's for future interceptors. An for god's sakes take a GOOD look at the foundary that improved SCOPE and medic kit look tasty.
Stalin, your tactics are VERY VERY good; the problem your having is strategic. Shooting down flying saucers is like a pinata fulla resources for research/selling on the grey market. If you can reliably shoot them down, all your money problems will go away via the grey market. Then your only problem will be producing satellites fast enough to placate the politicians.
@BlackDragon the shotgun seems to be there for taking down the BIG STUFF, by sprinting next to an enemy then using the double attack ability (accuracy at point blank isn't an issue).