"Being away from home is the hardest part," Nowak (with daughter Alyssa and son Alexander) said in a 2003 interview. While in training and on missions, Nowak would leave her son and twin daughters with her husband or a nanny. Photo by: SHARON STEINMANN / HOUSTON CHRONICLE / WIREIMAGE
Out of This World| Colleen Shipman, Lisa Nowak, William Oefelein
Nowak majored in aerospace engineering at the Naval Academy in Annapolis and spent 10 years in the Navy, rising to the rank of captain. In 1995 she was accepted into the NASA training program. Some 3,500 candidates vie every year for 20 slots in the space shuttle program, an intense and highly stressful competition. "NASA does its best to get cool customers; it wants to weed out who's going to crack when they're in the tin can," says Brian Berger, senior staff writer for Space News, which chronicles NASA. "Astronauts tend to be the cream of the crop. All the astronauts I know are unflappable, really together people."

Nowak seemed no exception. Still, the rigors of training put a strain on her family life; while preparing for missions she often spent weeks away from her husband and children. "There's not a lot of time for [personal things] and less time for family," Nowak said in a 2005 interview. "It's a sacrifice." When NASA chose her to be one of six astronauts on a mission aboard Discovery in July 2006, Nowak's life became even more hectic. "I am lucky to have a very supportive husband," she said in an interview shortly before the shuttle flight. "For me, family is first."

In fact, it was Nowak's son Alexander who helped her confront any fears she felt about going up in space only three years after the tragic explosion of the Columbia space shuttle, which killed seven astronauts, including three of Nowak's former classmates. "The day Columbia happened, [Alex] was there sitting with me, and we're watching the television, and there's people he knows that were on that flight," Nowak told Ladies Home Journal last September. "He reaches over and grabs my hand and says, 'Mom, I still want you to go. . . . I know they'll make it safe again, and I still want you to go.' "