Threaten North Korea with nuclear annihilation
The United States is spending billions of dollars on a missile defense system. This is in part because North Korea said it can now hit the United States with a nuclear warhead. I believe a better strategy would be to assure North Korea and the rest of the world that if it even attempts to strike the U.S. with a nuclear warhead, we will not attempt to, but will strike them with 200 warheads. North Korea may make the first strike if its missile makes it here, but it will be the last one it ever launches. In fact, it will be the last thing it ever does.