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In this image made on Feb. 20, 2015 showing a name engraved on the walls of a former chalk quarry, at the Cite Souterraine, Underground City, in Naours, northern France by HA Deanate, 148th Aero Squadron, USA. 150 Vermilyea Ave, New York City, The names are just some of nearly 2,000 First World War inscriptions that have recently come to light here, a two-hour drive north of Paris, thanks to efforts by Jeffrey Gusky, the site's new owners and local archaeologist Gilles Prilaux.  (AP Photo/Jeffrey Gusky) Mandatory Credit
In this image made on Feb. 20, 2015 showing a name engraved on the walls of a former chalk quarry, at the Cite Souterraine, Underground City, in Naours, northern France by HA Deanate, 148th Aero Squadron, USA. 150 Vermilyea Ave, New York City, The names are just some of nearly 2,000 First World War inscriptions that have recently come to light here, a two-hour drive north of Paris, thanks to efforts by Jeffrey Gusky, the site's new owners and local archaeologist Gilles Prilaux.  (AP Photo/Jeffrey Gusky) Mandatory Credit

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    Graffiti from WWI found underground

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Graffiti from WWI found underground

CNN's Todd Leopold reports on graffiti found in a French chalk quarry written by soldiers who fought in WWI.

Graffiti from WWI found underground

CNN's Todd Leopold reports on graffiti found in a French chalk quarry written by soldiers who fought in WWI.