"Turkish pianists forced to cancel US concert at last moment
Internationally known Turkish pianists, Ferhan and Ferzan Onder, were unable to attend a concert they were supposed to perfom at when the US issued them a single visa, reportedly assuming that the twins were in fact one person. People who had bought tickets to the twins' concert had their money refunded when it was discovered that the twins could not attend. "
More:Hürriyet - Turkish pianists forced to cancel US concert at last moment