The TSA has been a major reason for decrease in the travel crimes over a decade or more.So I guess that TSA was created in response to 2001 attacks.The public face of the 60,000-member TSA is at airport security checkpoints, but the agency’s mandate is to protect all modes of transportation against attacks, monitoring rail stations, transit systems and bus terminals.Chiefly concerned with air travel, the TSA employs screening officers in airports, armed Federal Air Marshals on planes, and mobile teams of dog handlers and explosives specialists. Great interview by the way.