Closed Captioning ON OFF apply | reset x Text Display Background Enhancements font Times New Roman Arial Comic Sans size T T T T color share link September 3rd, 2014 Study: Double mastectomy doesn't boost survival A new study says that removing both breasts to treat cancer affecting only one side does not boost survival chances for most women. More video Sponsored Content Now Playing The small town in New Hampshire looking for some electoral respect Sponsored Content Now Playing Super Bowl 50 is here! Bob Costas gives us his predictions Sponsored Content Now Playing Bernie Sanders joins 'SNL' as Democratic debate heats up Sponsored Content Now Playing Republicans duke it out in New Hampshire debate Women's Health Now Playing New Mammogram Guidelines Issued Now Playing Olympic hopeful faces her biggest challenge: growing up Now Playing In Fight Against Esophageal Cancer, Freezing Might Be the Answer Now Playing Should Pregnant Women Exercise? Cancer Now Playing Camera Flash Spotlights Cancer Now Playing WHO Group Says Processed Meat Can Cause Cancer Now Playing Boy: 'God Made Me Stronger Than a Brain Tumor' Now Playing Jon Stewart, Lawmakers Push Congress for 9/11 Responders Healthcare Most Watched Now Playing Sponsored Content Can you tell which way this bus is traveling? Now Playing Sponsored Content Somalia plane explosion 'likely' caused by bomb; explosive residue found Now Playing Sponsored Content Security forces unite in force for Super Bowl 50 Now Playing Sponsored Content Catch up on the biggest stories of the week with The Download Now Playing Sponsored Content Virginia Tech students 'carefully planned' killing of 13-year-old, police say Now Playing Sponsored Content Deadly 6.4-magnitude earthquake strikes Taiwan Now Playing Sponsored Content Can you tell who's the mom and who's the daughters?