STS-46 Payload Commander (PLC) Jeffrey A. Hoffman and Mission Specialist (MS) Franklin R. Chang-Diaz, wearing breathing apparatus masks, pose on the forward flight deck of Atlantis, Orbiter Vehicle (OV) 104, during pre-breathe session. With the possibility of an extravehicular activity (EVA) being added to the STS-46 agenda, the astronauts reported to this station and began the ''pre-breathe'' process when problems developed during the extension of the Tethered Satellite System 1 (TSS-1). The ''pre-breathe'' exercise and the EVA were cancelled as the TSS-1 procedures were resumed by remote operations.
