I was watching an old David Letterman from a few days ago, and he did a joke about Sarah Palin signing an autograph in Reno.

Someone had a flag they wanted her to sign. She glaldy obliged.

The only problem is -- there's a law that states you can't write on the flag (like we expected her to know that...hehehehhe).

Lettermans joke concluded with her apology. Which she typed up on a flag.