'But what crimes, what? What crimes? Why won't you say exactly what the crimes are? Admit what? What? What?' On April 3 2011, as he was boarding a flight to Taipei, the Chinese Artist Ai Weiwei was arrested at Beijing Airport. Advised merely that his travel "could damage state security" he was escorted to a van by officials, after which he disappeared for 81 days. On his release, the government claimed that his imprisonment related to tax evasion.