The TSA develops broad policies to protect the U.S. transportation system, including highways, railroads, buses, mass transit systems, ports, pipelines, and intermodal freight facilities. It fulfills this mission in conjunction with other federal agencies and state partners. However, the TSA’s primary focus is on airport security and the prevention of aircraft hijacking. It is responsible for screening passengers and baggage at more than 450 U.S. airports, employing screening officers in airports, armed Federal Air Marshals on planes, mobile teams of dog handlers, and explosives specialists.
Each coin measures 1.75 inches (44mm) in diameter.