The original finding aid described this as: Description: View of the Alpha Magnetic Spectrometer - 2 (AMS-2) and the EXPRESS (Expedite the Processing of Experiments to Space Station) Logistics Carrier 2 (ELC2) mounted to the S3 Truss segment. STS-134 Mission Specialist (MS-3) Andrew Feustel is visible removing a Materials International Space Station Experiment (MISSE) from the ELC2. STS-134 MS-4 Greg Chamitoff is visible on the S3 truss. Photo taken during the first session of Extravehicular Activity (EVA-1). Subject Terms: STS-134, Extravehicular Activity, Alpha Magnetic Spectrometer Date Taken: 5/20/2011 Categories: EVA Interior_Exterior: Exterior Ground_Orbit: On-orbit Original: Digital Still Preservation File Format: TIFF.