S93-33103 (2 Apr 1993) --- Wearing training versions of Space Shuttle Extravehicular Mobility Units (EMU), astronauts F. Story Musgrave and Jeffrey A. Hoffman use the giant pool of the Johnson Space Center's (JSC) Weightless Environment Training Facility (WET-F) to rehearse for the Hubble Space Telescope (HST) repair mission. The two are working with a full-scale training version of the Wide Field/Planetary Camera (WF/PC). The current WF/PC will be replaced with WF/PC-2. A total of five extravehicular activity (EVA) sessions will be conducted during the scheduled December mission of the Endeavour.