Another noobie question:
I'm stuck in June with plenty of money, happy countries, but no sparrowhawk launchers left to buy. I can try to make some, but with a UFO flying by about every 3-4 hours, I'm losing them faster than I can build them. I'm sending up two stilettos at a time with sparrowhawks. I'm researching aerial lasers but I haven't found anything better than sparrowhawks.
I've read that you shouldn't try to take on harvesters (maybe that's my problem), but I can't figure out how to tell one UFO from another.