With Colossus, RJD2 has become more sophisticated in integrating his assorted tastes, but the album preserves the sound that made him an underground star.

NPR: RJD2: A 'Colossal' Return To Form

And investments, including the Underground's current star project, the Jubilee Line extension, have sometimes been guided more by political considerations than by careful cost-benefit analysis.

ECONOMIST: The end of the tunnel

Dan Ingvaldson, a researcher at ISS, says movies, many of them not yet released to theaters, have made the rounds through these underground networks, making it conceivable that someone has already seen Star Wars: Attack of the Clones without having to pay for it.

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The Sun and the Daily Star say the rescue effort taking place 295ft (90m) underground is a race against time.

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But he got America to spend billions upon billions of dollars on weapons, on underground shelters that he believed could save most people in a nuclear attack and on Star Wars.

ECONOMIST: Edward Teller

It is also considering including underground fares with the price of the rooms which the company says are equiped to three star hotel standard.

BBC: News | The Company File | Tube station hotels plan

Some tips: hop on the scenic Star Ferry between Hong Kong Island and the Kowloon Peninsula, instead of taking the underground MTR.

BBC: Honeymoons for urbanites