we can shoot em down before they reach the sky.
long before they leave where they were launched.
thanks to the cold war, we got all sorts of toys to keep us safe
Apparently the US is still vulnerable but this is only from Countries like in Europe or from China/Russia, let's say. You know the countries that pose a sizeable threat already but are allied as long as the US tries to stay on everyone's good side.
They're talking about the AEGIS and THAAD, which are both systems designed to dispatch multiple targets. The new laser systems are all designed to lock on to multiple targets simultaneously to systematically dispatch one target at a time, and the stuff is crazy enough to take out things like Mortars and Tank Shells, bulky missiles are no problem. I can't imagine North Korea having enough missiles to even bypass the first layer of defenses, actually I can't expect them to have any threatning missiles at all to begin with.
So yeah, no need to panic.