Several decades of missionary opposition to Kromanti Play have driven this tradition partially underground and have led to serious schisms within the communities.

UNESCO: Intangible Cultural Heritage

To see why, consider the controversy last week after safety scares led to the closure of London Underground's Northern Line to the frustration of around 600, 000 commuters.

ECONOMIST: Why doing business with the government can be a bad idea

That is what the experience of Sir Bernard Crossland, a safety expert who led the inquiry into a disastrous underground railway fire in London in 1987 which killed 31 people, suggests.

ECONOMIST: Disasters

Transport Minister Sadiq Khan rounded off the session by telling the committee that he thought that PPP had proved good value to customers, as it had led to the improvement of services on the Underground.

BBC: Transport Committee

Jonny Barrios - whose care for his diabetic mother when he was a child led to him being the miners' unofficial doctor underground.

BBC: World media gear up for Chilean mine rescue

She unpicks other tangles too: the tense relationship between the impatient, ill-informed underground leadership in Poland and the divided, ill-led exiled government in London, sidelined and then dumped by the allies as the Soviet armies marched west.

ECONOMIST: Poland at war

Ironically, this fact was explicitly recognized in the Hatfield-Exxon legislation of 1992 that led to the present moratorium -- legislation that expressly contemplated additional underground tests would be necessary to prepare the U.S. stockpile, diagnostic tools and scientific cadre for a permanent ban on nuclear testing.

CENTERFORSECURITYPOLICY: A credible nuclear deterrent

The works look as through they are lifted straight from an underground geomorphic wonderland, but the intense craftsmanship behind these sculptures made of epoxy resin and LED lights is evident.

BBC: The City of Light becomes the city of design