When controllers sent commands to the engine to turn itself on again last Tuesday, they planned to collect more data on the status of the system but believed it was unlikely the engine would keep running.

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But others say the army will disappoint both those hoping it will preserve the status quo and those looking to it as an engine of change.

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That means it'll be more costly to GMAC to borrow funds to finance its loan engine than if the auto lender had climbed back to investment grade status, a perch it hasn't occupied since last spring.

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