A young man and a little girl look at the border fence from Playas de Tijuana, Mexico. Photojournalist Ariana Drehsler has been covering the caravan of migrants for weeks. In December, Customs and Border Protection agents began pulling her over for questioning each time she crossed back into the U.S.

A young man and a little girl look at the border fence from Playas de Tijuana, Mexico. Photojournalist Ariana Drehsler has been covering the caravan of migrants for weeks. In December, Customs and Border Protection agents began pulling her over for questioning each time she crossed back into the U.S.