1.   But the more restrictive bill would also ban cloning to make embryos that would be used for medical research, research that would destroy the tiny balls of cells.

2.   Companies are cloning to make copies of valuable animals.

3.   Is it cloning to make a baby that is the identical twin of an embryo that was never born?

4.   The letter seeks a permanent ban on cloning to create babies and a temporary moratorium on cloning to make embryos for medical research.

5.   The report did provoke a response from Dr. William Keye, president of the American Society for Reproductive Medicine, which opposes using cloning to make human babies.