AN AVIATION society show has been cancelled for a second year because of a spat between the DUP and Sinn Féin over the Maze prison site. The Ulster Aviation Society pulled a two-day event planned for later this month after Peter Robinson and Martin McGuinness's department failed to approve it. It is the second year running that it has been forced to cancel the event at the Maze site because of a Stormont row over its redevelopment. The DUP last year said it was blocked by Sinn Féin's Mr McGuinness, while Sinn Féin said the society's event could proceed[...]