And what kind of a 'fence' would you put up to protect us from another country who gets set up in space with the goal of blasting us from there?
Man WILL continue to go into space, build space stations and, eventually, bases - If we're not there also, we will be at the mercy of someone who wishes us ill = got a fence for that?
And BTW, this is a thread about the danger our astronauts are in - please don't hijack it for immigration - there are plenty of those to post on