concerned with testing and developing new hardware and procedures to make Space Shuttle flights safer. It would also re-supply the ISS with equipment and consumables. In January 2004, Nowak participated in an eleven-day cold weather survival training course in Canada with fellow NASA astronauts Dominic Antonelli and William Oefelein, Swedish astronaut Christer Fuglesang, Russian cosmonaut Dmitri Kondratyev, and Canadian astronaut (and future Governor General) Julie Payette. The course commenced on January 19, and included four days of instruction with the Canadian Armed Forces. They were then dropped off in the wilderness in northern Quebec and had to make their way back on foot. They covered in eleven days, completing the course on January 29. Nowak had worked together with Oefelein, who had been selected as an astronaut with the class of 1998, when they were both stationed at Patuxent River in 1995. When Nowak and Oefelein returned to Houston they began an extramarital affair, which they attempted to conceal. As serving Navy officers, they could have been charged with conduct unbecoming an officer and a gentleman, which includes adultery, under the Uniform Code of Military Justice. Oefelein's wife filed for divorce in February 2005 after discovering emails between him and Nowak. Their divorce was finalized in May 2005. Oefelein moved into a small apartment, to which he gave Nowak a key. She left personal effects there, and she soon became a familiar sight to other residents of the complex. Space flight NASA announced in December 2003 that STS-121 would be commanded by Steven Lindsey, with Mark Kelly as pilot and Michael Fossum and Carlos Noriega as mission specialists. On November 18, 2004, NASA announced that Nowak and her classmate Stephanie Wilson would join the STS-121 crew as additional mission specialists. They were assigned the task of manipulating the robotic arms of the Space Shuttle and the ISS. The STS-121 mission was originally scheduled for March or April 2005, but was soon postponed to July owing to difficulty implementing all the changes required. During the launch of for STS-114 in July 2005, debris separated from the external tank, the very problem which had caused the loss of the , and STS-121 was further postponed until a solution to the problem could be found. In February 2006, the mission was rescheduled for a launch window between May 3 and 22, but in March multiple problems forced a further postponement until July. A