The news comes as troops pull out of Afghanistan and begin a new offensive against the Islamic State. "Hagel was not seen as a very forceful secretary of defense," NPR's Tom Bowman says.
State transportation officials say they're suspending construction-related lane closures during the upcoming holiday travel period.
The experimental NewLink vaccine is based on a harmless virus that has been genetically engineered to incorporate bits of the Ebola virus. Testing of the vaccine has begun in healthy volunteers.
The Marine Corps has begun a yearlong experiment to decide whether women can enter ground combat. Hundreds of men and women began training a few weeks ago at Camp Lejeune in North Carolina.