Campaigners have called for the UK's only giant pandas to be given "political asylum" over fears they will be put down if they go back to China. Yang Guang and Tian Tian have been unable to breed at Edinburgh Zoo since their arrival in 2011 - sparking fears among activists that they will be seen as "useless" following the end of their decade-long, £600,000-a-year lease deal. The pair have been in the zoo for 10 years and came to Scotland to be part of a breeding program....