What is the primary purpose of the TSA?

The primary purpose of the Transportation Security Administration (TSA) is to protect the nation's transportation systems and ensure the safe travel of passengers. This mission encompasses a wide range of responsibilities, including the screening of passengers and their belongings at airports, securing airports from threats, and implementing policies to safeguard transportation methods across the country.

By focusing on security measures, the TSA aims to prevent terrorist acts and ensure that public transport remains safe and secure for everyone. This involves working with various stakeholders, including airlines, airport authorities, and law enforcement agencies, to create a cohesive approach to security.

In contrast, the other options do not accurately represent the TSA's primary function. Issuing travel documents, managing airport staff, and handling customer service complaints are not core responsibilities of the TSA, as the agency is specifically designed to address security-related issues in transportation systems.