By day, Lazar Kunstmann is a typically avant-garde Parisian, an urbane, well-spoken video film editor who hangs out in the fashionable Latin Quarter. By night he inhabits a strange and secret world with its base in the tunnels beneath the French capital – the world of the urban explorers.

Mr Kunstmann belongs to les UX, a clandestine network that is on a mission to discover and exploit the city’s neglected underworld. The urban explorers put on film shows in underground galleries, restore medieval crypts and break into monuments after dark to organize plays and readings. In the eyes of their supporters, they are the white knights of modern culture, renovating forgotten buildings and staging artistic events beyond the reach of a stifling civil service.

The authorities view them differently: as the dark side of the City of Light – irresponsible, paranoid subversives whose actions could serve as a model for terrorists. A police unit has been trained to track les UX through the sewers, catacombs and old quarries that are their pathways under Paris. Prosecutors have been instructed to file charges whenever feasible.

Read complete article here..

http://www.timesonline.co.uk/tol/news/world/europe/article2554240.ece

Note: If they can gain access like this, do you think a determined group of terrorists would have any trouble gaining similar access?