All Things Considered

People who volunteer for medical research usually expect to remain anonymous. That includes people who donate their DNA for use in genetic studies.

But now researchers have shown that in some cases, they can trace research subjects' DNA back to them with ease. And they say the risk of being identified from genetic information will only increase.

Childhood vaccines for diseases like measles, polio and whooping cough have repeatedly been proved safe and effective. Even so, some parents still worry that the schedule of vaccinations — 24 immunizations by the age of 2 — can be dangerous. That worry is likely misplaced, according to a yearlong review of all available scientific data.

As President Obama unveiled his gun control proposals Wednesday, he highlighted mass shootings at schools in Colorado, Virginia and Connecticut. He also mentioned another group of children, not in school — the ones on the street corners of Chicago.

Chicagoan Annette Holt was at the White House during Obama's address. Her teenage son, Blair, was shot to death five years ago on a Chicago bus as he shielded a fellow student from a spray of bullets.

The Department of the Interior is huge — more than 70,000 employees manage a half-billion acres of public land, mostly in the West. The department does everything from operate national parks to administer Native American social programs and manage wild horses.