May 25. Have you ever wished that you did not have to wait in that long security line at the airport? If you have never desired this, you have probably never flown through Denver (DEN) or Atlanta (ATL)… What about customs and immigration when returning to the United States?
TSA Precheck is a trusted traveler program (TTP) run by the United States Transportation Security Administration. The program reduces wait times in security lines at airports by providing an exclusive experience for program members. Below is a quick overview of how the program works:
A trusted traveler program (TTP) is a program for passengers who have been vetted by the United States government and proven not to be a threat. The US has multiple trusted traveler programs, two of which are for air travel, TSA Precheck, and Global Entry (keep reading for more information on this). Those who wish to become members / trusted travelers of TSA Precheck must complete an application, background check, and interview and pay the fee before being cleared and allowed to access the benefits that the program offers.
Source: Simple Flying