Under US law, the particular work is not protected by copyright, being a government work. Therefore, an infringement suit in the US would go nowhere. Under the Berne Convention Article 7(8),
the term shall be governed by the legislation of the country where
protection is claimed; however, unless the legislation of that country
otherwise provides, the term shall not exceed the term fixed in the
country of origin of the work
This is acknowledged via EU Directive 2006/116/EC, Article 7:
Where the country of origin of a work, within the meaning of the Berne
Convention, is a third country, and the author of the work is not a
Community national, the term of protection granted by the Member
States shall expire on the date of expiry of the protection granted in
the country of origin of the work, but may not exceed the term laid
down in Article 1.
So unless there is a special provision in the country in question, the shorter of the protection-time of the country of origin and that of the country of lawsuit prevails, i.e. zero in this instance. No jurisdiction in Europe appears to have created a special exception to the effect that government works are subject to copyright protection.
