TOPSHOT - A boy who has been travelling in a caravan of Central American migrants hoping to get to the United States, is helped to climb the metal barrier separating Mexico and the US to cross from Playas de Tijuana in Mexico into the US, on December 2, 2018. - Thousands of Central American migrants, mostly Hondurans, have trekked for over a month in the hopes of reaching the United States. (Photo by Pedro PARDO / AFP)