Gene Editing and Making Superman

Science fiction has looked at the genetic alteration of humans to create "supermen" (Khan in Star Trek for example).

As often occurs, science fact begins to catch up. In a recent report, researchers at Berkeley have developed techniques to "edit" human genes.

While promoted as possible cures for genetic diseases, cancers and HIV, this simple technique could be used to change genes and create super athletes and other interesting traits.

Scientists from the International Society for Stem Cell Research (ISSCR) have called for a worldwide ban on the use of a gene editing technique. But will this prevent the unscrupulous use?