> The writer traveled from Vienna to Pyongyang by train, giving him 36 unsupervised hours in North Korea.
He hacked the north korea visa entry and used his entry visa in an unexpected way - arriving at a different entry point, which was technically not disallowed, but not set up to handle western travel.
The normal Beijing-Pyongyang train is set up for westerners, and the loophole has since been closed.
The writer traveled from Vienna to Pyongyang by train, giving him 36 unsupervised hours in North Korea.