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A Kurdish rebel activist says Turkey's bombing jeopardizes a cease-fire.
The former GOP presidential contender is back in the home of the nation's first primary.
Hedge fund manager gave $2.5 million to Koch Bros. super PAC
A 6-foot-4-inch Illinois cow has been named the world's tallest.
Dallas officials warn that the prospect of additional cases are "a real possibility."
Senator, congressman endorse banning travel from West Africa to U.S.
All three patients live within a few miles in northeast Dallas.
National Nurses United calls for routine guidelines, hazmat suits that meet high standards.
The biggest and most buzzworthy news to start your morning.
Video allegedly shows police beating at least one pro-democracy activist.
Republican Joni Ernst leads Democratic Rep. Bruce Braley in new Iowa poll.
Breaking down the Iowa Senate race between Bruce Braley and Joni Ernst.
People are changing Earth so much that many scientists are giving a new name to the time we live in.
Use of 'social' prompts outcry from Democratic critics.
A multimedia screen will replace the digital timer that ticked down launches for 45 years.
The Ebola virus reproduces out of control as patients enter more advanced stage of illness
Nurses say they're not ready for Ebola fight; CDC prepares to step up training.
The country's biggest super PAC donor does not rule out running for office one day.
Regrets? Obama voters have a few as the percentage who recall voting for him dips.
Texas Nurses Association is urging health care workers to speak up with questions or concerns about safety.