A new study suggests that Medicare's 5-year-old prescription drug plan is keeping seniors out of hospitals and nursing homes, saving the federal program an estimated $12 billion a year in those costs.

Stocks are closing lower as U.S. lawmakers remained at a stalemate over raising the country's borrowing limit. Industrial companies fell following disappointing results from 3M and U.S. Steel.

Fiscal issues now tops terrorism as the greatest threat to national security, young people say. A poll from the nonpartisan, nonprofit Generation Opportunity shows Americans 18-29 say the nation's debt is the top issue threatening U.S. security.