STS103-332-021 (19-27 December 1999) --- Astronaut John M. Grunsfeld, who.participated in two of the three STS-103 space walks to service the Hubble Space Telescope (HST), dons an extravehicular mobility unit (EMU) space suit for one of the walks. Grunsfeld is wearing the liquid cooling and ventilation garment that complements the EMU.