Aesir video of its prototype vertical takeoff and landing unmanned aircraft, which uses the Coanda effect to generate lift by blowing air from a central fan over its curved surface. Aesir was formed to develop the UAV when original developer GFS Projects ran out of money GFS stood for Geoff's Flying Saucers, named after original designer Geoff Hatton. See www.aesiruas.com. For a video of the latest Embla demonstrator flying (with sound), go to    • Video