Migrants, who are part of a Central American migrant caravan, leave Mexicali for Tijuana, Mexico, Tuesday, Nov. 20, 2018. Tensions have built as nearly 3,000 migrants from the caravan poured into Tijuana in recent days after more than a month on the road, and with many more months likely ahead of them while they seek asylum in the U.S. (AP Photo/Rodrigo Abd), APTOPIX