U.S. speedskating took a big hit in Sochi today, coming out of the 1,000-meter competition with no medals. The team's highest rank was eighth, earned by Shani Davis, who has dominated this race in the past.
There's new evidence out today that's raising questions about whether women in their 40's and 50's should routinely undergo mammography to detect breast cancer. A new analysis of a big Canadian study found no evidence that regular mammograms save lives. The study even suggests that for many women, regular breast X-rays may do more harm than good.
NPR's Rob Stein joins us now to talk about this report. It appears in the British medical journal BMJ.