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As vessels become more porous, researchers say, they allow toxins in the bloodstream to reach, and damage, delicate brain cells and raise the risk for dementia.

It's the latest twist in a story that, to some, exemplifies the overhyped talking points that often get blown out of proportion during the two-week wait for the Super Bowl.

For 62 years, Saudi Arabia has been ruled by sons of the founder of the Kingdom, Abdul Aziz. Robert Siegel talks to Middle East specialist Joseph Braude about Saudi succession.

Robert Siegel talks to Maureen Sullivan, senior vice president of strategic services and chief strategy officer for Blue Cross Blue Shield Association, which did the study.

U.S. diplomats have wrapped up two days of talks with Cuban officials — the highest-level meeting in 35 years. The aim is to start talking through how to restore diplomatic relations following the historic warming of ties announced last month by President Obama and President Raul Castro.

Thousands of European men and women traveled to Syria to fight, and some have returned home. The concern is that they were dispatched by al-Qaida or the so-called Islamic State to attack the West.

In the wake of attacks in Paris, part of the investigation into terror cells in Europe has led to Spain. One of the Paris gunmen, Amedy Coulibaly, is believed to have visited Madrid in the days before he burst into a kosher market, killing four people.

Audie Cornish talks to Nicolette Gendron, a member of Kappa Alpha Theta Sorority at the University of Virginia and a writer for the C-Ville Weekly.

Dealers are extending loans to a growing number of people with weak credit, and more of them are having trouble making payments. The situation is evoking comparisons to the subprime mortgage boom.

The shortstop known as "Mr. Cub," who began his career in the Negro leagues, hit 512 home runs in his 19 seasons with the team and remained a cherished figure to the team and its fans. He was 83.