Columbia
Gilmor: "Obviously we need to find out what went wrong, if we can, before sending the shuttles back up. But I fear this accident (assuming that's what it is, as is almost surely the case) will instead be a justification for paralysis -- a halt to U.S. space exploration when the proper response is to redouble humanity's push into the frontier. It has never been more critical, given the terrestrial threats, to get the species off the planet and to find new resources for those who remain. "