As undocumented migrants look for more remote trails to cross into the United States, the Customs and Border Patrol is returning to a tried-and-true tactic -- horse patrols. According to this article, the Border Patrol now has 334 horse units, a 33 percent rise since 2008. Horse patrols date back more than a century along the border, to the time when agents policed against Chinese immigrants. "The stealthiness of the horse is great," Border Patrol supervisor Jaime Cluff says on the video. "They get us to areas where not even the ATVs can access."