Thousands of unaccompanied children make a dangerous trek to the U.S. southern border

Summary: Tens of thousands of unaccompanied children arrive at the U.S.-Mexico border each year, most coming up from central America in a long, often dangerous journey. Amna Nawaz speaks to a group of sisters who are making the trek alone. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders