Nice CT mate
But you can't include any mention of aliens in pre-invasion technology I'm afraid. Drop that and restructure a little and you'll have a great finished piece.
I guess you are referring to this section:
Anti-Alien missile is that it was developed to engage the next generation stealth fighters/bombers. As a result of this the missile needs very vague radar signals to lock on and track an enemy target. The technology used to create this is rather simple actually as it uses the disturbed radar echoes from a stealth target to create a unique target profile that differs from that of an ordinary radar object
Don't know, I guess it's alright here. If you think of the X-COM background story, you might remember that already several countries tried to fight the aliens on their own before the game starts. I could very well imagine, that something like this has happened prior to the foundation of X-Corps as well, and thus we do know that the UFOs are pretty hard to detect radar-wise.