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The Finals Stage of the Progressive Automotive X-Prize is taking place this week and, if nothing else, the organizers and teams involved now really know what they're doing. Most everything is running well and the teams "sailed" through tech inspection, in the words of Eric Cahill, the X-Prize's senior director. Also, there are fewer cars now to test, so the scene at the Michigan International Speedway is quiet and tense. After all, there's a lot of money – $10 million total – up for

Automotive X-Prize Knockout Stage – Click above for high-res image gallery

Automotive X-Prize Knockout Stage – Click above for high-res image gallery