In August of 2001, President Bush announced his decision to limit federal funding of stem cell research to already established lines of embryonic stem cells, while forbidding funding for any research that required the destruction of additional human embryos. But his decision ended neither stem cell research nor the debate over the ethics of such research. How do we weigh the medical benefits of this research against the destruction of embryos? Where do we draw the line on research using human embryos and are we on a slippery slope toward even more controversial research?