APTOPIX Central America Migrant Caravan
Migrants gather at the Mexico-U.S. border after getting past a line of Mexican police at the Chaparral crossing in Tijuana, Mexico, Sunday, Nov. 25, 2018, as they try to reach the U.S. The mayor of Tijuana has declared a humanitarian crisis in his border city and says that he has asked the United Nations for aid to deal with the approximately 5,000 Central American migrants who have arrived in the city. (AP Photo/Rodrigo Abd)