Forensic reports suggested substances used in the explosion had included RDX, ammonium nitrate and petroleum hydrocarbon, he added.

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Mohamed and Mousavi were arrested in June 2012 and charged with possessing 15kg (33 pounds) of the powerful explosive RDX.

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Incidentally, Acura's SH-AWD also makes the RDX the best-handling compact crossover out there, at least until the Porsche Cajun is ready.

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More are on the way -- the talk of this year's big Detroit auto show was all about "crossover" vehicles such as Ford's new Edge and Acura's RDX, while even Mini is planning to build a wagon version of its beloved Cooper hatchback.

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These expected high-mileage runners run the gamut from affordable small cars like the Toyota Yaris and the Scion xB and xD, to family minded SUVs including the Acura RDX, Lexus RX 350 and the Toyota RAV4 and 4Runner to utilitarian pickups like the Chevrolet Avalanche and Honda Ridgeline.

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