TOPSHOT - A Central American migrant, taking part in a caravan to the US, is pictured during a stop at a temporary shelter in a sports center, in Mexico City where they expect to ask for a permit to continue travelling through Mexican territory, on November 6, 2018. - Some 4,000 migrants en route to US recover energy Monday in a shelter in Mexico City, where they await the arrival of thousands more. US President Donald Trump warned that up to 15,000 soldiers could be deployed in the border with Mexico to stop the migrants' attempt to cross illegally into the country. (Photo by Alfredo ESTRELLA / AFP)