Since October of last year, more than 52,000 unaccompanied children have been detained while attempting to enter the U.S. Some of those recently apprehended were flown to San Diego yesterday by the Department Homeland Security.

As they were driven to a processing center in Murietta, a small San Diego suburb, they were met by crowds of protestors. For more on the events that unfolded, we're joined by KPBS's Mark Sauer