close. again, officially is the word. they may get an on core performance. john zarrella reports for us. reporter: the end is sketched in stone, or up in the air. two spags shuttle flights left. nasa s new budget signed by president obama calls for adding one more flight next june maybe. florida senator spearheaded the effort to get the added shuttle curtain call. it would allow nasa to stock the space station with tons of extra, computers, space walk gear, experiments, all kinds of spare parts. and it would save jobs for a few extra months. if i put on my parochial
and it would save jobs for a few extra months. if i put on my parochial state of florida hat, or the texas senators put on theirs, then an ease of the adjustment of the workforce is clearly one of the concerns that we have. reporter: those arguments don t fly with everyone. the rule of thumb is, whenever the space shuttle flies, it is a waste of money. the space shuttle is hugely expensive for what it does. six, five and it is it s not that safe, which is why it is being discontinued. reporter: bottom line, our spare parts worth the risk and the cost? how much? about half a billion a flight. on top of that, the budget only calls for the added mission. you don t have the money funded yet for that additional flight. it is not there. well, we re going to get it. but reporter: are you nervous about that? well, of course i am. i mean, you have to deal with senators that one senator can stop the whole works.