>>52 US: Official motto since 60s - In God We Trust (because we can't trust ourselves). Agnosticism isn't favoring or disfavoring of any religion - it is a standpoint that by its fruit one shall know it, since its claims regarding the order and nature of the universe can not be empirically verified. All religions are simply ideologies that incorporate a supernatural dimension and/or undiscover/undiscoverable forces acting upon our dimension. Atheism is the rejection of all said notions, and it is equally irrational though probably not as harmful (as long as it too does not enthuse it being forced on non-believers). I am a practical atheist because I prefer its fruits. I am a theoretical agostic because I am reality-based. Agnosticism is probably the immediate thinking behind the 1st amendment. It is not a religion. Taking agnosticism officially could be simply symbolical but it is compatible with the first amendment (no plusses or minuses distributed, since agnosticism doesn't hold any position to be the correct one, it simply is an argument that no stance is intrinsically better) and it would send a message to islamists, rabid atheists and christianists: "Show us absolute proof or your faith will be considered faith and therefore unendorsable. Show us proof that your system is validified by and compatible with actual reality and it is not a faith. So why bother trying to impose on others?".