Defence And Security Exhibition 2015 By April 15 2016, 6:00pm April 15 2016, 6:00pm Share Defence And Security Exhibition 2015 Share via Facebook Twitter Linkedin Whatsapp Messenger Email Post link Copy Link LONDON, ENGLAND - SEPTEMBER 15: A drone is on display during the Defence and Security Exhibition 2015 at ExCel on September 15, 2015 in London, England. This year the Defence and Security Exhibition (DSEI) has over 1,500 exhibitors spanning air, navy and land based military, medial and unmaned systems and equipment (Photo by Ben Pruchnie/Getty Images)