The discovery of the BRCA1 gene opened the door to a new type of discovery, one that has helped women know if they are genetically predisposed to breast cancer with a simple blood test. Hear from Mary Claire King, who discovered this gene, on the importance of this genetic discovery. More information on BRCA1 & BRCA2: http://sgk.mn/13Jc4ZJ #CancerFilm #HistoryofBC http://cancerfilms.org/ | Susan G. Komen