But this May, a new mail carrier took over the Post Secret route: Sonia Warren.

但今年五月，一个新的邮件运营商接手后的秘密路线：索尼亚·沃伦。

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With no road signs and few maps, they had to put their trust in directions passed by word of mouth and in secret signsnails driven into trees, for example-that conductors used to mark the route north.

没有路标，地图也很少，他们只好信赖别人给他们所指路的方向以及自己辨认那些钉在树上的暗号：例如，通常过去的向导都会留下向北的路标暗号。

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North Koreans travel along a secret route known as the new underground railroad to reach free countries via unwelcoming China.

FORBES: If Even Defectors Aren't Welcomed, Can the Two Koreas Ever Unify?

By cutting the 34 secret service officers who guard the tour route, we are saving the paychecks of others!

FORBES: Move up http://i.forbesimg.com t Move down

However, this agreement collapsed in 2002 after America accused North Korea of having a secret programme to enrich uranium another possible route to making nuclear bombs.

ECONOMIST: Not a final deal, just a start | The