Nick Schifrin:

No, it's not. And it's very different from what the report said.

The report itself is fairly modest. That's because it doesn't have much to build on. The existing system we have, a few dozen interceptors in the frozen tundra of Alaska, doesn't work. And the rest of the concepts are just view graphs and ideas.

But what President Trump said dramatically expands the scope of this program, and that makes it dangerous. It turns it from a regional program designed to defeat a few primitive missiles from a small nation to one that's global in scope to defeat any missile anywhere launched by anybody.

That would take major technological breakthroughs, decades of work and trillions of dollars. And the worst part is, it stimulates the very thing it's supposed to prevent, a new arms race.

What's the response of China and Russia? To cower? To retreat? No. They will do what we do. They will build more weapons to overcome our defense. That's the dynamic of an arms race.