Annual Mammograms Necessary? Physicians Debate Prevention

Aired: 12/25/2012 | 0:06:51 | Clip
Annual mammograms have been seen as an important screening tool: They are very effective in helping find small, slow-growing cancers. But how good are they at finding fatal tumors? Health correspondent Betty Ann Bowser reports on a recent study published in the New England Journal of Medicine that has reignited the debate.