Honduran migrants arrive at the Gran Central Metropolitana bus terminal, to join a second caravan -due to leave early tomorrow- heading to the United States, in San Pedro Sula, 180 km north of Tegucigalpa, on January 14, 2019. - President Donald Trump is threatening to declare a national emergency as he pressures Congress for money to build a wall on the US-Mexican border to stem a surge in illegal immigrants. Many migrants -who arrive as families or unaccompanied children, hoping to gain a foothold in the country- when caught, most are processed by the authorities, then released pending a court date, and authorities say they are mostly never seen again as they meld into US society. (Photo by ORLANDO SIERRA / AFP) 14/01/2019 - 04:01