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More than 90 clinical trials have tested therapeutic vaccines in cancer patients, but the results have been a mixed bag. A recent study in mice suggests that changing a traditional ingredient in the vaccines could make a big difference.

The wealth gap between white and black families is growing — and that's especially apparent in the housing market. Host Michel Martin talks to Washington Post correspondent Michael Fletcher about the financial disparities facing black families.

Czech President Vaclav Klaus freed thousands of prisoners. But what really angered his opposition was when he halted the prosecution of some fraud cases.

Homeland Security Secretary Janet Napolitano said that as the across-the-board cuts take shape, TSA will have to leave vacancies open and cut overtime.

The provision restricted the commercial speech of the day laborers, the court ruled. Arizona argued that part of the law was passed to mitigate traffic hazards.

Fire ant stings are a painful fact of life in the South. Sometimes the stings can cause fatal allergic reactions. Yet many people who know they're allergic aren't getting allergy shots that could protect them.

A new compilation, Lula Lounge: Essential Tracks, showcases Canada's thriving Latin music scene.

President Obama named a new Department of Energy secretary, a new budget director and a new head for the Environmental Protection Agency on Monday. All three will require confirmation by the Senate.

President Obama will name Ernie Moniz as the next secretary of the Department of Energy. Moniz is a physicist and academic — but unlike his predecessor, he's a seasoned politico who knows Washington and Congress. Moniz will please and annoy both ends of the energy policy spectrum: He's a big solar and wind booster, but a fan of natural gas and nuclear power as well.

A competition to encourage entrepreneurs to design health apps came up with a wide range of possibilities. One app audits medical bills for errors and savings. Another helps find prices for services, such as dental exams, for people without insurance coverage.