US-MIGRATION-MEXICO-CENTRAM

Barb wire is seen at the US-Mexico border wall at Friendship park in San Ysidro, California on November 18, 2018. - The Central American migrant caravan faced a desperate situation on November 16, 2018 as its numbers swelled at the US-Mexican border, where it got a cold welcome and a warning that its chances of entering the United States were "almost nil." After spending more than a month traveling the 4,300 kilometers (2,700 miles) to the Mexican border city of Tijuana, walking and hitch-hiking much of the way, thousands of migrants faced the bleak reality that their American dream was about as untouchable as it was when they started. (Photo by Sandy Huffaker / AFP) (Photo credit should read SANDY HUFFAKER/AFP via Getty Images)