What federal department is the TSA currently included in?

The Transportation Security Administration (TSA) is currently included in the Department of Homeland Security (DHS). This inclusion reflects the agency's primary responsibility for ensuring the security of transportation systems in the United States, which encompasses airports, airplanes, railways, and mass transit systems. Established in the aftermath of the September 11 attacks in 2001, the TSA's mission aligns closely with the broader goals of the DHS, which include protecting the nation from natural disasters, terrorist attacks, and other security threats. The TSA is responsible for implementing security measures that protect passengers while facilitating the flow of trade and travel, making its integration into the DHS logical in terms of operational coherence and security oversight.