President Obama's director of the National Institutes of Health was approved by the Senate without objection, but is now cancelling stem cell research projects he approved, because a federal judge has ruled that they violate the intent of Congress. This week's New Yorker contains an extensive profile of Francis Collins, who brought the Human Genome Project to a successful conclusion, early and millions under budget, but now finds himself in an odd position, partly because he's a believing Christian. Peter Boyer wrote the story.