dr. o'brien worries the new recommendations might give women a false sense of security. >> dr. jim michaelson, who served on the american cancer society subcommittee that suggested the new numbers, insisted these are just minimum recommendations. >> so why 45 instead of 40? >> well, it's a fairly subtle recommendation. it's really good at 40, but it's also good at 45. so i don't think it's one or the other, we say both give women benefit and great savings in life. companes won't see it that way and refuse coverage for some mammograms before the age of 45. >> we very much feel we want available to them from age 40 if they so choose. >> dr. o'brien says women themselves need to take control. >> women need to consult with their doctors, more than ever, women need to be their own advocates. >> the new guidelines are based on increasing evidence that mammograms often produce false positives in younger women. >> next, move over shark tank. how the man who made sam adams a success is hoping to hit it big. all this for just 30 grand! why this historic new hampshire home is a real steal