The DVD explores how the US managed to keep stealth technology secret for more than a decade. Night Stalkers were designed and built in total secrecy and flown only at night.
JOHN CHRISTOPHER is an author, balloon pilot and life-long space enthusiast who was lucky enough to meet Buzz Aldrin. He is currently the editor of Airship and Aerostat, he has previously written Balloons at War and Brunel's Kingdom for The History Press and lives in Gloucestershire.