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There was a mass shooting at a social services center in Southern California, women are getting more opportunities in the U.S. military, and Mark Zuckerberg has some news. Take the BuzzFeed News quiz, made from stories featured in the <a href="http://bit.ly/1TygivC" target="_blank">BuzzFeed News app</a> (now on both Android and iOS!) and the <a href="http://www.buzzfeed.com/tools/email/news">BuzzFeed News newsletter</a> this week.

There was a mass shooting at a social services center in Southern California, women are getting more opportunities in the U.S. military, and Mark Zuckerberg has some news. Take the BuzzFeed News quiz, made from stories featured in the BuzzFeed News app (now on both Android and iOS!) and the BuzzFeed News newsletter this week.

Do You Know What Happened In The News This Week?

Police said 14 people were killed and 21 others were injured in a shooting Wednesday in San Bernardino, California. Last Friday, a gunman killed three people at a Planned Parenthood clinic in Colorado Springs. How often, on average, do mass shootings occur in the United States?

There are few days — if any — between most mass shootings. More [than 75% of the time](http://www.buzzfeed.com/jsvine/heres-how-little-time-america-gets-between-mass-shootings#.enbxe47yMx), there has been another mass shooting on the same day or the day before, according to data from [ShootingTracker.com](http://shootingtracker.com/), which defines mass shootings as “when four or more people are shot in an event, or related series of events.”

It's about every day.

1\. Gun Violence In America

World leaders have been meeting in Paris this week for the U.N. Climate Change Conference, with the aim of reducing global carbon emissions. Which of these countries emits the most carbon dioxide?

China’s [carbon dioxide emissions](http://www.buzzfeed.com/peteraldhous/climate-change-quiz) overtook those of the U.S. in 2007.

It's China.

2\. Global Climate Talks

U.S. Secretary of Defense Ash Carter ordered which branch of the military to open all combat jobs to women?

“Everyone in uniform has to meet [military] standards, and everyone who meets those standards should have the full and equal opportunity to serve their country,” [Carter said](http://www.buzzfeed.com/emaoconnor/military-to-open-combat-positions-to-women#.ism3wnXbW3). The order will become effective 30 days from Thursday.

It's all branches of the U.S. military.

3\. Women In The Military

Basketball star Kobe Bryant, who plays for the Los Angeles Lakers, said that he is retiring from the game. How did he announce it?

Bryant announced his retirement in a poem titled [“Dear Basketball.”](http://www.buzzfeed.com/mbvd/kobe-bryant-announces-he-will-retire-from-basketball-at-the#.rp7rVEwnmr) The 37-year-old posted the poem in The Players’ Tribune.

It's a poem.

4\. Kobe Bryant Says Bye

Cyber Monday 2015 was the biggest online sales day in history, according to data from Adobe. How much money did shoppers spend?

Shoppers spent about $3.07 billion, according to data from Adobe. Sales "late in the day helped push Cyber Monday revenues to more than $3 billion for the first time,"[CNBC reports](http://www.cnbc.com/2015/12/01/cyber-monday-sales-top-3-billion-beat-forecast.html).

It's more than $3 billion.

5\. Cyber Monday

Opening arguments began on Wednesday in the trial of William Porter, one of six police officers facing charges associated with Freddie Gray’s death. In what city is the trial being held?

Porter [faces charges](http://www.buzzfeed.com/joelanderson/cop-in-freddie-gray-trial-faces-a-diverse-jury#.ayovrlqRo) of involuntary manslaughter, second-degree assault, misconduct in office, and reckless endangerment. Freddie Gray’s death in police custody in April sparked unrest throughout the city.

It's Baltimore.

6\. Freddie Gray Trial

World AIDS Day was Tuesday, Dec. 1. About how many people worldwide are living with the disease?

Globally there are an estimated [34 million people](http://www.buzzfeed.com/lynzybilling/images-of-how-hiv-affects-lives-around-the-world#.lao7EWkm5) who have the virus.

It's 34 million.

7\. World AIDS Day

Facebook CEO Mark Zuckerberg announced two major things this week. What were they?

Zuckerberg said he would give away [99% of his Facebook shares — worth $45 billion today — over the course of his lifetime](http://www.buzzfeed.com/mathonan/mark-zuckerberg-has-baby-and-says-he-will-give-away-99-of-hi#.ag4PaMv4qP99%). He and his wife, Priscilla Chan, have also given birth to a baby girl, named Max.

8\. Zuckerberg's Big News

Who is headlining the NFL's Super Bowl 50 halftime show in February?

Chris Martin said the band was [“honored and thrilled”](http://www.buzzfeed.com/lindseyadler/coldplay-to-headline-super-bowl-50-halftime-show#.obmYX3ymAY) to play the show. Coldplay has a new album out Friday.

It's Coldplay.

9\. NFL's Halftime Show

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