Central American migrants traveling with a caravan to the U.S. make their way to Mapastepec, Mexico, Wednesday, Oct. 24, 2018. Thousands of Central American migrants renewed their hoped-for march to the United States on Wednesday, setting out before dawn with plans to travel another 45 miles (75 kilometers) of the more than 1,000 miles that still lie before them. (AP Photo/Rodrigo Abd)