we can. reporter: they a very veteran crew. yes, it is. reporter: at with point this was supposed to be the very last flight in the space shuttle program. steve lindsey was the commander of the astronaut out of. he told me at one time he turned down this opportunity a couple times, before he finally agreed to fly. nicole tot and mike barrett were on the space station when they got the call to fly this flight. that s right. reporter: so a real veteran crew, and it s been a long road getting here. problems with hydrogen leaks, et cetera, and finally here now in february, discovery set to make her 39th and final voyage. what are we looking now? about three minutes to liftoff. three minutes to go. the space shuttle has spent 352 days in orbit. it s just amazing. it has to be bittersweet for the folks to see this final launch for discovery. yeah, i was saying that to