Employees make a flat bottom in the round tunnels of the North/South subway line with a pavermachine in Amsterdam, on February 5,2014. Concrete will be poured in three different phases, on which the metro rail can be installed later. AFP PHOTO /ANP / LEX VAN LIESHOUT - Netherlands out - Belgium out -
{"Image ImageDescription": "Employees make a flat bottom in the round tunnels of the North/South subway line with a pavermachine in Amsterdam, on February 5,2014. Concrete will be poured in three different phases, on which the metro rail can be installed later. AFP PHOTO /ANP / LEX VAN LIESHOUT           - Netherlands out - Belgium out - (Photo by LEX VAN LIESHOUT / ANP / AFP) (Photo by LEX VAN LIESHOUT/ANP/AFP via Getty Images)"}