What is the primary role of the Transportation Security Administration (TSA) within the broader framework of homeland security?

The primary role of the Transportation Security Administration (TSA) is to protect the nation's transportation systems to ensure freedom of movement for people and commerce. This includes security responsibilities for aviation, rail, mass transit, and pipelines. TSA's most visible function is screening passengers and baggage at airports to prevent explosives and other dangerous items from being brought onto aircraft. However, TSA's responsibilities extend beyond aviation security to include developing and implementing security standards, conducting risk assessments, and working with transportation stakeholders to enhance security throughout the transportation sector. TSA aims to balance security measures with the need to maintain an efficient and reliable transportation system.