Police say at least 14 people have been killed in a mass shooting in Southern California.
Around the world on December 1, people marked World AIDS Day.
Three years after his viral music video Gangnam Style, South Korean pop star Psy is back in the spotlight.
December 1 was also #GivingTuesday.
On December 1, 1955, an African-American woman named Rosa Parks refused to give up her seat at the front of a city bus.
The hashtag #COP21 started trending over the weekend ahead of the United Nations’ conference on climate change.
Basketball star Kobe Bryant has been grabbing headlines his entire career.
This is the time of year retail businesses in the U.S. look to start making money.
As the holiday shopping season begins, hackers are trying to trick users into revealing their private account information.
After news reports said Tuesday morning that Turkey had shot down a Russian war plane, Twitter users declared World War III was near.