Approximately 40% of the U.S. paper currency in circulation was counterfeit by the end of the Civil War.
47
The U.S. motto, 'In God We Trust', was not adopted as the national slogan until 1956.
72
During World War 1, Harry Houdini took 1 year off performing to help sell war bonds and teach american soldiers how to escape from German handcuffs.
34