Spectacular look behind Korea's iron curtain

A German photographer given unique access to the annual mass gymnastics demonstrations in North Korea is releasing a book of some of the images he was able to capture.

Werner Kranwetvogel travelled to the reclusive nation in 2005, and details the Arirang games in his new book, A Night in Pyongyang.

Up to 100,000 performers take part in the extravaganza each summer, which is criticised as a waste of money in the impoverished Stalinist state.