TODAY   |  March 16, 2013

Pentagon to boost missile defense after threats from North Korea

To counter the growing threat from North Korea, the U.S. military will bolster the defense system, adding interceptor missiles designed to intercept and destroy ballistic missiles aimed at the continental U.S. NBC’s Jim Miklaszewski reports.

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>>> >> new concerns about north korea 's nuclear weapons . the pentagon says it will spend a billion dollars to beef up the missile defense system along the west coast . here is now from our correspondent.

>> the north korean leader revealed his troops during military kper sizes but at the pentagon hagel warned it is missiles that sounded the alarm? north korea in particular recently made advances and engaged in a serious of irresponsible and reckless provocatio provocations.

>> 20 counter of u.s. military will stolester the missile defense system in alaska by 14% adding at forth fwrooely designed top destroy missiles aimed at the u.s. and will also install a high power radar in japan to groove early warning capability. why the concern now? it rarped up last april during this military pa reside. u.s. intelligence was shocked to see what appeared to be long range ballistic missiles that can be fired from mobile launchers with a capability of reaches the u.s. armed with a nuclear warhead .

>> we watched this evolving threat very closely.

>> they launched a satellite into space last september and conducted a test last month.

>> they still have a couple technological hurdles but this is a near term threat.

>> recently they threatened to lunch a strike against the u.s. but as the u.s. strengthens the missile defenses kim jong -un was warned don't even think about it.

>> we believe this young lad ought to be deterred by that and if not he will be ready.

>> it will be two to three years before the entire missile defense system in alaska and up and running and the $1 billion it will take to pay for it won't show up in the budget until sometime next year.