today

Sunita will run the 26.2 miles in the Boston Marathon on April 16 from 210 miles above the earth. on a treadmill aboard the international space station. She will be harnessed to a specially designed treadmill with bungee cords. She hopes her effort will serve as an inspiration. "I encourage kids to start making physical fitness part of their daily lives," she said.

"I think a big goal like a marathon will help get this message out there." She qualified for the marathon when she completed the course in three hours 29 minutes and 57 seconds in Houston last year. She is serving a six-month stint on the international space station.