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View of Don Pettit,Expedition 30 Flight Engineer (FE),holding Alpha Magnetic Spectrometer (AMS) 750 Gigabit (GB) Hard Drive (HD),at Direct Current-to-Direct Current Converter Unit 1 (DDCU-1) Rack in the U.S. Laboratory (LAB1P3). AMS logo is visible on laptop computer screen. Photo was taken during Expedition 30.