A KTN is a code given to trusted travelers who enroll in programs such as TSA PreCheck or Global Entry. Enrollment involves online applications, in-person interviews, and paying the application fee. Trusted Traveler Programs offer benefits like expedited security screening and streamlined entry into the US....... Military and Department of Defense civilians Military and DoD Civilians receive TSA PreCheck as a benefit of their employment and service. This includes all service members of all components of the armed forces, students at the armed forces' service academies, Federal civil service employees, and non-appropriated fund (NAF) civilians. Your DoD ID number, which...