Central American migrants wait for rides to pursue journey to US While some Central American migrants in El Arenal wait for rides by the side of a highway to continue their journey north to the United States, some others board buses and trucks in the central Mexican town of Ixtlan del Rio. Meanwhile US soldiers install barriers at the San Ysidro port of entry on the US-Mexico border in the town of Tijuana, in anticipation of the arrival of the migrants' caravan.