Chinese researcher faces criticism after claiming 1st gene-edited babies

Chinese medical officials say they are investigating the scientist who claims to have created the world’s first genetically-edited babies. He Jiankui says the twin sisters were born with immunity to HIV, the virus that causes AIDS. He claims he altered their DNA in a lab using a gene-editing technique called CRISPR. Dr. Tara Narula reports on why other scientists find this alarming.