That this is even a question worth asking is an indication that politicians & news media have been using fear to get our attention for so long, we have become irrationally hyper-vigilant. We have borders. There is no way to make them impermeable. There is danger but we have already spent a gazillion dollars dealing with it and are relatively safe. There will always be some danger no matter what we do or how much we spend or how fearful we become. GET OVER IT!!! This is a description of life as it is, as it has always been & as it will always be. It is insane to behave as though we can protect ourselves from every eventuality that we don't like. NOTE TO LEGISLATORS: American children still die of preventable diseases. Women & children die as a result of domestic abusers. Our education system is falling into ruin. Our infrastructure is pitiful. If you focussed on issues that mattered & that you could do something about, we would all be better off! DANGER EXISTS! NO MATTER HOW MUCH TESTOSTERONE YOU FLING AT IT, IT WILL ALWAYS BE THERE!