Central America Migrant Caravan
Migrants hitch rides on passing truck as they continue on their journey after Mexican police briefly blockaded the road to keep them from advancing, outside the town of Arriaga, Mexico, Saturday, Oct. 27, 2018. Hundreds of Mexican federal officers carrying plastic shields briefly blocked the caravan of Central American migrants from continuing toward the United States, after several thousand of the migrants turned down the chance to apply for refugee status and obtain a Mexican offer of benefits. (AP Photo/Rebecca Blackwell)