Medical researchers are a step closer to fulfilling the promise of preventing disease — not just for living individuals, but for generations to come. Scientists have successfully edited a gene that causes an inherited disease in a human embryo. Will Huntington's, Tay-Sachs, some breast and ovarian cancers — even early-onset Alzheimer's -- disappear for those who have the resources? So far, research is confined to the laboratory, but it's raised hope about eliminating human suffering despite questions about unintended consequences.
How far are we from genetically-modified people?
Lauran Neergaard - Associated Press - @AP, Antonio Regalado - MIT Technology Review - @antonioregalado, Kelly Ormond - Stanford School of Medicine - @Stanford, John Evans - University of California, San Diego - @UCSanDiego