Central American migrants begin their morning trek as part of a thousands-strong caravan hoping to reach the U.S. border, as they move away from Isla, Veracruz state, Mexico, Sunday, Nov. 4, 2018. Thousands of wary Central American migrants resumed their push toward the United States on Sunday, a day after arguments over the path ahead saw some travelers splinter away from the main caravan, which is entering a treacherous part of its journey through Mexico. (AP Photo/Marco Ugarte)