In God We Trust
In God We Trust is an slogan that was declared America's national motto in 1957, during the McCarthy era. It was first placed on coins in 1865. Today, the motto appears on all US money.
[ http://www.ustreas.gov/education/fact-sheets/currency/in-god-we-trust.shtml U.S. Treasury - Fact Sheet on the History of "In God We Trust"]