On 2 October 2000, Lightcraft Technologies (USA) successfully flew a 12.2 cm (4.8 inch) diameter craft to a height of 71 m (233 ft), powered only by light. They used a US Army 10 kilowatt pulsed carbon dioxide laser on the ground, fired upwards at the 51 g (1.8 oz) craft, which reflects the light backwards to a point just beneath it. The resulting expansion of the superheated the air provides the thrust. These test flights occurred at the White Sands Missile Range, New Mexico, USA.