Border control refers to the measures and policies that a country implements to regulate the movement of people and goods across its borders. This includes checking passports, visas, and other identification documents to ensure that individuals meet the entry requirements. Border control is essential for maintaining national security, preventing illegal immigration, and managing the flow of trade. In many countries, border control is managed by agencies such as the Customs and Border Protection in the United States or Border Force in the United Kingdom. These agencies work to enforce laws, conduct inspections, and monitor activities at land, sea, and air entry points to ensure compliance with immigration and customs regulations.