Of the nearly 2,000 miles of the border, this is where the most arrests are made. Throughout the day, agents find and detain migrants; usually a Central American mother or father with a young child. They arrive disoriented and exhausted from the dangerous journey through Mexico.

A growing chorus of voices has warned about the possibility of increased immigration raids by Immigration and Customs Enforcement. The potential for trauma is immense, explains William D. Lopez, a Postdoctoral Research Fellow at the University of Michigan.

The Alabama senator has opposed legal immigration for more than two decades, linking new arrivals to terrorism. During the campaign he was one of the closest advisers to President-elect Trump.

K'naan, chicana rapper Snow Tha Product are also on the 'Immigrants (We Get the Job Done)' track off the 'Hamilton Mixtape'

Arizona Border Recon has about 200 members, including some Hispanics, who are armed and monitor border crossings by drug smugglers and undocumented migrants. They claim to help U.S. authorities, but the Border Patrol does not endorse them.

Students and teachers at universities across the country protested Wednesday, urging protection for their undocumented peers. The Republican president-elect has promised to suspend Obama's executive actions on immigration.