I think that the Great Wall of China worked for awhile :) ..... East and West Germany were one country until after the war, unlike the people who come to the states illegally. Ronald Regan helped to bring down that wall because it divided families and because Germany should never have been divided up the way it was. 
I read the Canadian news and now Canada is starting to "freak out" over all the illegals who are showing up there. Baby T. recently reminded the illegals that Canada was a nation of laws (doesn't that sound familiar?)  and folks need to come into Canada legally. 
Word is out that Canada is the place to be, free health care and lots of other free things. 
I thought Baby T. had invited people to come up so I was surprised to hear his speech the other day. 
Point is, we need to do  something NOW to protect our borders. 
Even the Europeans have started to do something. 
People should have to follow the legal process, it is not fair to those who have applied and are waiting.