Why you should act quickly at first sign of heart attack

(CNN) -- Calling 911 as soon as symptoms of a heart attack begin saves lives, according to the American Heart Association/American College of Cardiology new guidelines published in the AHA journal Circulation and the Journal of the American Col

When is social-media use a crime?

(CNN) -- In the crowded world of social media, with its virtual currency of likes and followers, some people will do anything for attention.

Danica Patrick on her new Sonic racing game: 'I shoot balls of flames'

(CNN) -- Even if you know nothing about IndyCar Racing or NASCAR, the odds are you know the name Danica Patrick.

17 killed as armed inmates attempt prison break in northern Mexico

(CNN) -- At least 17 people were killed when inmates tried to escape from a prison in northern Mexico Tuesday, firing guns at guard towers and running through tunnels below the facility.

Polio workers come under fresh attack in Pakistan

ISLAMABAD, Pakistan (CNN) -- Health workers administering polio vaccinations came under fresh attack in Pakistan on Wednesday, a troubling development in a nation that remains one of three in the world where the disease has yet to be eradicated

Park holds lead in South Korea presidential vote count

SEOUL, South Korea (CNN) -- With more than two-thirds of the votes counted in South Korea's election, candidate Park Geun-hye has a slight edge over her rival -- giving hope to her supporters that she may become the country's first woman president.

Inouye to lie in state in Capitol

WASHINGTON (CNN) -- The late Sen.

Feds: Florida man wanted to attack NYC landmark but lacked funds, bombs

(CNN) -- A Florida man arrested on terror charges allegedly wanted to attack a landmark in New York City but didn't have the money or bomb-making components to carry out his plot, according to arguments made by federal prosecutors during a detention

'So long, Ebb and Flow:' NASA crashes probes into moon

(CNN) -- A pair of robotic twins that have been diligently mapping the moon this year went out with a bang Monday. As scheduled, the Gravity Recovery and Interior Laboratory probes Ebb and Flow crashed into a mountain on the moon, ending a fruitfu

Benghazi siege: The ambassador's last minutes

(CNN) -- They were in hiding in a place security officers called a "safe area." It was anything but. Outside an angry crowd grew, gunfire rang out and a fire blazed. Thick smoke blinded the three trapped men.