How many? All, or should you be selective? People with contagious diseases? People with criminal histories? Etc, etc. The issue is controlled immigration with safeguards against those, or open borders with no control?
This is a more of a study on the public's opinion of this model gun. It gets a bad rap in media, so people who don't know anything else about it don't want anything to do with it.
As we've seen in the last few years, you can find experts to say whatever you need. That'll have a longer lasting effect on the public's psyche than anything.
Cost to develop, govt red tape, number of possible customers, and of course, profit. We'd have to analyze each of these, factors weigh the results, etc.
Nope, Joe is very, very close to finishing the cure and just needs a little help from Congress to finalize it. But noooo, those dastardly Republicans don't want him to give us this cure. It's all their fault.
It didn't happen.
It only happens a little bit.
It happens and that's a good thing.