Formed as part of the Department of Homeland Security in 2003, Customs and Border Protection (CBP) is tasked with regulating international trade and enforcing U.S. regulations on trade, customs, and immigration. In addition to employing nearly 60,000 workers, CBP is the federal agency that employs the largest number of working dogs, assigned to ports and border patrol stations, as well as operating a fleet of MQ-9 Reaper surveillance drones.