Semiotics [edit]. In semiotics (the study of signs or symbolism), salience refers to the relative importance or prominence of a part of a sign.
How to Become a U.S. Marshal. The United States Marshal Service is the Department of Justice agency that is responsible for protecting the judicial system. They ensure that justice can be carried out without threat to court buildings, court officers, witnesses, or anyone else involved in trials.
Get educated now on how to become a marshal and you'll be ready to apply in no time. An estimated 3,200 to 4,000 air marshals currently work to protect passengers on overseas and domestic flights. These positions are part of the Department of Homeland Security's Transportation Security Administration (TSA).