According to the A.P. the U.S is weighing the possibility of shooting down N. Korean long-range ballistic missiles:

[Pentagon’s Missile Defense Agency spokeman Rick] Lehner would not comment on possible use of the U.S. missile defense system, but two other defense officials said Tuesday that the administration is weighing responses to a missile test, including attempting to hit it in flight over the Pacific. The United States has 11 ground-based missile interceptors in Alaska and California, although it is not publicly known how many of the 11 are currently available for use in an emergency.

Problem.

After untold billions of dollars poured into the Star Wars program since the 80’s, we still don’t have the ability to shootdown a missile:

Pentagon spokesman Bryan Whitman said he could not say whether the unproven multibillion-dollar U.S. anti-missile defense system might be used in the event of a North Korean missile launch. That system, which includes a handful of missiles that could be fired from Alaska and California, has had a spotty record in tests.

"Spotty record" is a bit of a joke.  Our anti-missile defense system simply has never worked.  Not once.  Nada.  Never.