Cloning Trevor; granted rare access to the labs of Advanced Cell Technology, the only U.S. group openly pursuing human cloning research for medical purposes, our correspondent spent six months tracking highly experimental work on the cells of a young boy with a life-threatening genetic disorder. (Cover Story)

At 9:00 in the evening on January 29, just as President George W. Bush was about to begin his first State of the Union address, I gathered with three anxious [...]