U.S. Customs and Border Protection (CBP) is the largest federal law enforcement agency of the United States Department of Homeland Security. Its primary mission is to safeguard America's borders, protecting the public from dangerous people and materials while enhancing the nation's global economic competitiveness. CBP officers and agents are responsible for enforcing hundreds of U.S. laws and regulations, including those related to immigration, customs, agriculture, and trade. They operate at ports of entry, along the land and sea borders, and in international airports, utilizing a variety of technologies and tactics to prevent illegal entry and ensure the smooth flow of legitimate trade and travel.