underground

 A Chinese Christian woman prays during a service at an underground independent Protestant Church in Beijing, China. China, an officially atheist country, places a number of restrictions on Christians and allows legal practice of the faith only at state-approved churches. The policy has driven an increasing number of Christians and Christian converts 'underground' to secret congregations in private homes and other venues. While the size of the religious community is difficult to measure, studies estimate there more than 65 million Christians inside China with studies supporting the possibility it could become the most Christian nation in the world within a decade.

Kevin Frayer/Getty Images

A Chinese Christian woman prays during a service at an underground independent Protestant Church in Beijing, China. China, an officially atheist country, places a number of restrictions on Christians and allows legal practice of the faith only at state-approved churches

Commuters board an underground train at King's Cross station in London April 29, 2014. Millions of commuters faced transport chaos on Tuesday after eleventh-hour talks failed to avert a two-day strike on the London Underground train network over plans to cut jobs and close ticket offices.

Neil Hall/Reuters

Commuters board an underground train at King’s Cross station in London. Millions of people faced transport chaos on Tuesday after talks failed to avert a two-day strike on the London Underground train network over plans to cut jobs and close ticket offices.

Actors dressed as zombies exit Bank Station in London as peer-to-peer lender RateSetter highlights the issue of 'zombie' savings accounts with  lifeless returns . PRESS ASSOCIATION Photo. Picture date: Wednesday January 15, 2014. The independent study commissioned by RateSetter found that 79% of Britons do not check their savings returns against inflation, with some falling as low as 0.1% earning just  1 a year on savings of  1,000.

Matt Alexander/PA

Actors dressed as zombies exit Bank Station in London as peer-to-peer lender RateSetter highlights the issue of “zombie” savings accounts with lifeless returns. The independent study commissioned by RateSetter found that 79 per cent of Britons did not check their savings returns against inflation, with some falling as low as 0.1 per cent, earning just £1 a year on savings of £1,000.

ames Apps, six, looks at the 2020 Tube map of the future, made entirely from LEGO Bricks, at Londonís King's Cross Station to celebrate 150 years of the London Underground.

Geoff Caddick/PA

A child examines the 2020 Tube map of the future, made entirely from Lego bricks, on display at London’s Kings Cross Station to celebrate 150 years of the London Underground.

Contractors work on the East Side Access project beneath Grand Central Terminal, Thursday, April 18, 2013 in New York.  When complete the East Side Access project will connect Long Island Railroad trains to Grand Central Terminal serving approximately 160,000 customers a day. It is one of three bold projects under New York that will expand what's already the nation's biggest mass-transit system by 2019.

Mary Altaffer/AP

Contractors on the East Side Access project beneath Grand Central Terminal in New York on Thursday. When complete the project will connect Long Island Rail Road trains to the terminal serving about 160,000 customers a day. It is one of three bold projects under New York that will expand what’s already the nation’s biggest mass-transit system by 2019.