Is Alaska At Risk?

The short and simple answer is Yes... but with a bunch of qualifications behind it.  At best range estimates, North Korea is capable of hitting targets on the Aleutian Chain, mainland Western Alaska and the western side of the Kenai. All of this probability is subject to a near flawless launch and flight.  With their record of failing to keep their missiles flying, it's doubtful that if they did fire at Alaska that they'd even hit anything.  

Secondly, if North Korea decided to launch an attack, they would more likely fire at closer higher value targets.  But even that scenario is unlikely as they undoubtedly know that such an action would end up with Lil' Kim dead along with untold numbers of innocents.  Just like what happened in Iraq for much less and on questioned reasons.  The benefit of a Korean Peninsula conflict is almost too irresistible to the Military Industrial Complex that shapes American foreign policy.  

Not only will those mega multinational corporations profit from a conflict, but afterwards they will have unfettered access to North Koreas known natural resources.  In addition to the minerals, a wjole new consumer goods market will emerge.  There'll be mega stores and internet shopping popping up within months if not weeks of a regime change or unification in Korea.