In the Discworld books; the motto of the City Watch is FABRICATI DIEM, PVNC which is Dog latin for "Make my day, punk". Because many film directors used this motto for their police forces, some police forces in America now use this in theirs! For a project I'm working on, I've use the phrase VERITAS VOLO TU EXPEDIO which approximatly means "The truth will set you free". 
 Gerkinman TNG 20:12, 17th October 2005