If you build a wall along the Mexican border, will it stop terrorists? There is a much longer, less guarded border to our north. Justin Trudeau welcomes immigrants and they can walk across the border from Canada without challenge (except grizzly bears.) Heavy vetting is good, but just like criminals will find guns, terrorists will find a way in. How many 9/11 terrorists came from those seven countries? How many came from countries not included in the ban, possibly because the POTUS has businesses there? No matter who is POTUS, this is the craziest time I have seen in my lifetime.