Editor's Note:
Migrants, from a variety of poor Central American countries, attempt to cross the border into the United States in hopes of a better life in Tijuana, Mexico, on November 13, 2018. US Defense Secretary Jim Mattis said on Tuesday he will visit the US-Mexico border, where thousands of active-duty soldiers have been deployed to help border police prepare for the arrival of a "caravan" of migrants. (Photos: Guillermo Arias/VCG)
A group of migrants from poor Central American countries walk along the border wall near Tijuana, Mexico, as they attempt to enter the United States in hopes of a better life on November 13, 2018. Photo: Guillermo Arias/VCG 
A group of migrants rest near the border wall near Tijuana, Mexico, as they attempt to enter the United States in hopes of a better life on November 13, 2018. Photo: Guillermo Arias/VCG 
Migrants swim near the border wall near Tijuana, Mexico, on November 13, 2018. Photo: Guillermo Arias/VCG
