LKS 20181111 LKS 20170502 LKS 20161102 LKS 20160104 COP001; Security checks travellers IDs on January 4, 2016 at the train station in Kastrup (Denmark), the last stop before Sweden. For the first time in half a century, Sweden was demanding photo identification for all travellers from Denmark in a drastic move to stem an unprecedented influx of refugees. / AFP / Scanpix Denmark / Scanpix / Nils Meilvang - LEHTIKUVA / AFP