Underground pick pockets
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Tackling Barcelona's underground thieves

Whether you call it the Metro, the Tube or the Subway - underground transport makes the world go round.

Whether you call it the Metro, the Tube or the Subway - underground transport makes the world go round.

BBC News has been touring the globe's train networks to find out what it's like to be a commuter in some of the world's biggest cities.

Laura Trevelyan looks at New York's "dirty" subway and Pascale Harter examines Barcelona's underground thieves.

  • 04 Apr
  • From the section World