The quest for synthetic humans

Dolly the sheep was cloned in 1996, but no human being has ever been duplicated. Now there's the possibility of creating a human from scratch. Genetic scientists have already mapped the human genome, opening the possibility of eliminating disease. A Harvard geneticist is raising money to manufacture a human genome with the potential of creating a synthetic person who has no parents. We talk with him and others — including fellow scientists — who raise ethical and religious objections that he's going too far too fast.