What is a primary function of the Customs and Border Protection agency?

The primary function of the Customs and Border Protection (CBP) agency is to enforce immigration laws and regulations. This encompasses monitoring and controlling the borders of the United States to prevent illegal immigration and ensure that individuals entering the country comply with all legal requirements. CBP plays a vital role in protecting national security by assessing and processing travelers, confirming their eligibility to enter the country, and preventing unauthorized entries. This includes inspecting people and their belongings at ports of entry, and ensuring that immigration policies are followed.

The other functions mentioned, such as scheduling flights, conducting passenger surveys, and overseeing airline alliances, fall outside of the purview of CBP. These activities are typically managed by different entities within the aviation industry and are not related to the enforcement of immigration laws, which is the central responsibility of CBP.