Tim Sullivan/Associated Press

The U.S. Food and Drug Administration says drugmakers have recalled more than a half-million bottles of the blood pressure medication prazosin hydrochloride over concerns it may include a cancer-causing chemical.

Surveys show that a third of American adults can't name the three branches of the federal government. One found that 10% of college graduates think TV's "Judge Judy" serves on the U.S. Supreme Court. Many people think it's time for a new push for civics instruction in college.