Doctors are prescribing too many CT scans for children, a study says, even though they know that the radiation used in the tests increases children's lifelong risk of cancer.
Choosing other tests and dialing back the radiation used in the scans would prevent 62 percent of related cancers, according to Diana Miglioretti, a biostatistician at the University of California, Davis, who led the study.
In recent decades, a quiet revolution has been transforming the way Washington works.
Because the U.S. government does not have the workforce to complete all of its tasks, it employs private companies like Booz Allen Hamilton to do the work for it. Booz Allen is the company where Edward Snowden, who said he leaked secrets about the National Security Agency, most recently worked.
Over the past 25 years, this contract workforce has grown and plays a major role in the U.S. government, says Paul Light, a professor of public service at New York University.