In this undated handout artist's rendition released by Japan Aerospace Exploration Agency (JAXA) in Tokyo, a supersonic aircraft, piggybacked on a rocket, flies in the sky. The Japan's space agency plans to launch the arrow-shaped airplane at twice the speed of sound high over the Australian outback as early as September, 2005 in a crucial test of the country's push to develop a supersonic successor to the retired Concorde. (AP Photo/Japan Aerospace Exploration Agency, HO). Click to enlarge

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