after "endeavour's" return, scheduled for june 1st, it will go on display at the california science center in los angeles, not before it carries a $2 billion piece of equipment into space, a particle detector that's designed to analyze cosmic rays. "endeavour" is the youngest nasa shuttle. i was reading, nina, in that vacuum between the end of the space shuttle and the commercial ones coming online, it will cost about $49 million to take you to the space station. that's a fairly expensive taxi ride. >> the cost of the space race is something the united states may not have enough money for. the united states reached its debt ceiling. the limit is just under $14.3 trillion here. the u.s. secretary -- treasury secretary says he can do creative accounting to stay below that until at least august 2nd. the question is what happen