Scott and Mark Kelly discuss year-long NASA space mission
TODAY: Identical twin astronauts Scott and Mark Kelly spoke on The Today Show about their upcoming year-long trip to the International Space Station, the longest time any American has ever spent aboard the orbiting outpost, to study the effects long-term space missions have on the human body.
"For me, having flown a long-duration flight before, on a personal level what makes it special is the duration, and the challenge that provides," Scott said.
Follow more space news at Breaking News
Photo: Scott Kelly aboard the Soyuz TMA-01M spacecraft on docking day with the International Space Station on Oct. 9, 2010. (NBC News)