AIR & SPACE MAGAZINE Floating Pyramids Hovering aircraft may be more stable if top-heavy. Joint Service Audiovisual Team February 15, 2012 An air-to-air rear view of a UH-60 Black Hawk (Blackhawk) air ambulance helicopter in use during the joint Exercise BRIGHT STAR '83. Visible in the background are the Great Pyramids and the city of Cairo. Joint Service Audiovisual Team Get the latest stories in your inbox every weekday.