The defense of North America with anti ballistic missile systems are often derided as “Star wars”. Apparently this current administration and the Missile Defense Agency would strongly disagree. I am not one bit resentful or sorry about the money and effort spent on defensive systems like this. Would the long standing GMD anti missile defense critics say the administration is lying to us?

MR. CARNEY: I can tell you that the United States is fully capable of defending against any North Korean ballistic missile attack. And our recent success in returning to testing of the upgraded version of the so-called GBI, or the CE2 missile, will keep us on a good trajectory to improve our defense capability against limited ballistic missile threats such as those from North Korea. But let’s be clear, we are fully capable of dealing with that threat.

More: Press Briefing by Press Secretary Jay Carney, 3/7/2013

Some links as relates to this technology that is growing in capacity and reliability.
spacewar.com
mda.mil