Thirty years after the worst nuclear accident in history, Chernobyl has become a tourist attraction. Tens of thousands of people are believed to have died prematurely from the catastrophe which spread a radioactive cloud over Europe in 1986, but last year 17,000 people visited the so-called exclusion zone anyway. VICE News sent Simon Ostrovsky to Chernobyl to find out just how safe it is to go there.