what is tsa

TSA stands for Transportation Security Administration. It is an agency of the U.S. Department of Homeland Security that was created in response to the September 11, 2001 terrorist attacks. The agencys mission is to protect the nations transportation systems to ensure freedom of movement. TSA is responsible for security screening at airports, train stations, bus stops, and ports. TSA PreCheck is a membership program that offers dedicated airport security lines and streamlined screening at a few hundred airports across the U.S. . Upon approval, members receive a Known Traveler Number that lets the airlines know that they are eligible for TSA PreCheck benefits.