From the Document: "On a daily basis in fiscal year 2020, over 650,000 passengers and pedestrians and nearly 78,000 truck, rail, and sea containers carrying goods worth approximately $6.6 billion entered the United States through 328 U.S. land, sea, and air ports of entry (POE), according to U.S. Customs and Border Protection (CBP). Within the DHS, CBP is the lead federal agency charged with a dual mission of keeping terrorists and their weapons, criminals and their contraband, and other inadmissible individuals out of the country while facilitating the flow of legitimate international travel and trade through the nation's POEs. CBP's Office of Field Operations is responsible for conducting passenger and cargo processing activities related to security, trade, immigration, and agricultural inspection at the nation's POEs. Since 2013, CBP has entered into public-private partnerships with stakeholders, such as port authorities or local municipalities that own or manage the ports or private companies that conduct business through the ports, under its Reimbursable Services Program (RSP) to cover CBP's cost of providing certain services at POEs[...] This fourth annual report updates key information from our January 2020 report by examining the status of CBP public-private partnership program agreements, including the purposes for which CBP has used the funds and donations from these agreements in 2020."
Government Accountability Office: https://www.gao.gov/