Astronauts Sunita Williams, left, and Robert Curbeam are seen boarding the van to take them to Pad 39B prior to launching aboard the space shuttle Discovery to the International Space Station, Saturday, Dec. 9, 2006, in Cape Canaveral, Fla. On Monday, Dec. 18, Curbeam is poised to set a new record for the most spacewalks completed on a mission by a single crewmember. It was to be the fourth spacewalk of this now 13-day mission. NASA added it to the schedule on Saturday after several attempts to fully fold the solar array were unsuccessful. (AP Photo/Dr. Scott M. Lieberman)