History of 'In God We Trust'
http://www.ustreas.gov/education/fact-sheets/currency/in-god-we-trust.shtmlsnip...
The motto IN GOD WE TRUST was placed on United States coins largely because of the increased religious sentiment existing during the Civil War. Secretary of the Treasury Salmon P. Chase received many appeals from devout persons throughout the country, urging that the United States recognize the Deity on United States coins. From Treasury Department records, it appears that the first such appeal came in a letter dated November 13, 1861.
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The Pledge of Allegiance A Short History
http://history.vineyard.net/pledge.htmsnip...
In 1954, Congress after a campaign by the Knights of Columbus, added the words, 'under God,' to the Pledge. The Pledge was now both a patriotic oath and a public prayer.
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Our Founding Fathers Were not Christians
http://freethought.mbdojo.com/foundingfathers.htmlsnip...
None of the Founding Fathers were atheists. Most of the Founders were Deists, which is to say they thought the universe had a creator, but that he does not concern himself with the daily lives of humans, and does not directly communicate with humans, either by revelation or by sacred books. They spoke often of God, (Nature's God or the God of Nature), but this was not the God of the bible. They did not deny that there was a person called Jesus, and praised him for his benevolent teachings, but they flatly denied his divinity.
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It won't change what they think, though. I have a friend who believes the same thing. ;)