In this Jan. 18, 2009 file photo, a U.S. Border Patrol vehicle sits parked in front of a crowd of people peering through the U.S.-Mexico border fence at Border Field State Park in San Diego.
In this June 19, 2008 file photo, U.S. Border Patrol agent Santos Flores walks in front of a section of old border fence, left, where it meets a five-mile section of new border fence at the border in Nogales, Ariz.
In this Oct. 14 1991 file photo, a group of illegal Mexican immigrants jump from a border fence to enter the United States, near Tijuana, Mexico.
Infographic provides details on four Border Patrol sectors along the Southwest border. Charts show the number of Border Parol agents, arrests and marijuana seized over the past two decades.