UFOs - or UAPs, as they re now being called - have enjoyed a renaissance in recent years. Nigel Watson, author of UFOs of the First World War walks us through historic cases.
Secret spy balloon mix-up led to Earth s only officially recorded UFO-related death dailystar.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from dailystar.co.uk Daily Mail and Mail on Sunday newspapers.