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.
The city's recruitment effort has a very different feel from years past as it tries to attract more diverse candidates. The force is 80 percent white; the population is more than 30 percent black.
Jeffrey Sterling was fired from the CIA in 2002. His case has drawn wide attention in part because he was accused of giving secret information to James Risen of The New York Times.
The federal budget deficit will fall in 2015, the sixth consecutive year of decreases relative to the overall economy, according to new figures by the Congressional Budget Office.
Lawmakers say the Obama administration is "stiff arming" Congress, keeping them away from diplomacy with Iran. The House Speaker is fighting back, inviting Israel's tough talking Prime Minister Benjamin Netanyahu to address Congress soon.
The NCAA has settled a lawsuit with Penn State over sanctions it imposed on the school related to a child abuse scandal involving one of the school's assistant football coaches. Under the settlement, all of Penn State's victories between 1998 and 2011 will be restored and the school will donate $60 million anti-child abuse programs. State officials sued to repeal a consent decree issued in 2012 after the serial abuses of former coach Jerry Sandusky were revealed.
Do billionaires have too much influence in both major parties? Three top Republican presidential prospects — Sens. Rand Paul, Marco Rubio and Ted Cruz — say no.
Israelis are watching the latest spat between Prime Minister Benjamin Netanyahu and the White House — which could worsen his country's global standing, but win him votes in Israel's March elections.