She may know more about national security than meets the eye according to a letter quoted by Jonah Goldberg:

Alaska is the first line of defense in our missile interceptor defense system. The 49th Missile Defense Battalion of the Alaska National Guard is the unit that protects the entire nation from ballistic missile attacks. It’s on permanent active duty, unlike other Guard units. (more on this unit, here

As governor of Alaska, Palin is briefed on highly classified military issues, homeland security, and counterterrorism. Her exposure to classified material may rival even Biden's.

She's also the commander in chief of the Alaska State Defense Force (ASDF), a federally recognized militia incorporated into Homeland Security's counterterrorism plans.

Palin is privy to military and intelligence secrets that are vital to the entire country's defense. Given Alaska's proximity to Russia, she may have security clearances we don't even know about.