View of stowage rack LAB1S3 in the Destiny U.S. Laboratory labeled for Active Rack Isolation System ARIS, Pulmonary Function in Flight PuFF experiment, and Human Research Facility HRF hardware. Also visible is the Tissue Equivalent Proportional Counter TEPC yellow hardware in middle of rack. Photo was taken during Expedition Four as part of the Surround Imagery for Station SIS experiment.