already done that. yeah. but we didn t stay more than a day or two. what is really important is sustainability. can we get to mars or moon or anyplace and stay on a more or less permanent basis? that s the challenge. reporter: the massive brains here predict the heavy lifting, unmanned missions, will lead to putting an astronaut on mars. when that happens they remind everyone they think they are indeed the center of the universe. back to you now. one more great story of achievement. an iowa man s final act is making the future brighter for 33 strangers. dale schroeder grew up poor, never married, worked as a carpenter for 67 years at the same des moines business. despite never having the opportunity to go to school himself dale was able to save up enough of his life savings to send 33 iowans to college for free. he wanted to help kids that