(1). even the will has been dated and showed those suspended, after the will's maker death, no one can make sure whether the lastest will they got is or not the really lastest one the person wrote. so, the information included in the so call "lastest will" is not actually available to make sure at the time after concerded person's death, because a dead person cannot tell information.
(2). even the goal changed, but The United States Space Station Project or USSSP was still served to accomplish its new goal. from the author's tone of front part, he seems to approve the USSSP to accomplish its new goal. but he turns to a controversial conclusion at last.