STS-31 Mission Specialist (MS) Sullivan dons EMU in OV-103's airlock

STS-31 Mission Specialist (MS) Kathryn D. Sullivan, wearing extravehicular mobility unit (EMU) & communications carrier assembly (CCA), attaches service and cooling umbilical (SCU) to the EMU connection on the display & control module (DCM) during contingency extravehicular activity (EVA) preparations in the airlock of Discovery, Orbiter Vehicle (OV) 103. The procedure was completed in case an EVA was required to support Hubble Space Telescope (HST) deployment.