@De-Koon: sigur ?
To register a .US domain you must comply with the Nexus requirement:

A natural person (i) who is a citizen or permanent resident of the United States of America or any of its possessions or territories, or (ii) whose primary place of domicile is in the United States of America or any of its possessions, or
An entity or organization that is (i) incorporated within one of the fifty (50) U.S. states, the District of Columbia, or any of the United States possessions or territories or (ii) organized or otherwise constituted under the laws of a state of the United States of America, the District of Columbia or any of its possessions or territories, or
An entity or organization (including a federal, state, or local government of the United States, or a political subdivision thereof) that has a bona fide presence in the United States.