Friends who have known each other for decades, or siblings who get along well and are comfortable spending long periods of time with one another, would also be suitable for this sort of situation, said Jason Kring, assistant professor at Embry-Riddle Aeronautical University, who is not involved with the mission.

CNN: 501 days in space with your spouse: Could you handle it?

It has been a recurring catharsis: About the time we get discouraged or jaded, someone along our long road surprises us with a welcoming act or expression of gratitude that instantly changes our outlook.

WSJ: Taken Aback by the Kindness of Strangers

But along the way, we can work with the capacity-building by the time we get ready.

WHITEHOUSE: The White House

Along with their volunteering duties, each volunteer will be get at least a half-day of viewing time on course during each day of the competition.

BBC: Gleneagles

Right now, too many of our citizens don't have an insurance policy at all, and those who do are afraid they will lose the one they have - afraid they will get too sick, afraid to stay home and not work full-time, and afraid their benefits will disappear along with their job.

CNN: McCain's October 11, 2007, speech on health care