MAKUHARI, JAPAN: Japan's auto giant Mazda unveils the concept model of "RX-8" which has hydrogen powered rotary engine during the press preview of the 37th Tokyo Motor Show in Makuhari, suburban Tokyo 22 October 2003. Asia's largest motor show will start from 24 October. AFP PHOTO / Yoshikazu TSUNO (Photo credit should read YOSHIKAZU TSUNO/AFP via Getty Images)
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