Columbia University School of Nursing dean says breast density camouflaged her cancer

Under new FDA regulations, all mammography facilities have to notify women of their level of breast density. Until now, this critical piece of information wasn't required to be shared with women, and it can potentially be a lifesaver. CBS News New York's Kristine Johnson spoke to a breast cancer survivor who says she thought she was cancer-free for years, but that wasn't always the case.