American astronaut Judith Resnik, one of three mission specialists during STS-41-D, positioning herself on the floor of the Space Shuttle Discovery's mid-deck to note some items on a clipboard pad. Charles D. Walker, payload specialist (left), anchors himself with a foot restraint while working at a stowage locker. Between the two is a sign with 'Hi Dad' by Dr. Resnik and held up to a nearby TV camera during early STS-41D downlinked television.