Antoine Leiris lost his wife Helene in the Bataclan theatre in Paris. His Facebook tribute to his wife and challenge to her killers has since been shared thousands of times. Mr Leiris read out the letter to BBC News in Paris. Video journalist: Mohamed Madi

It's easy to think that ISIS is some sort of evil, medieval cancer that somehow has resurfaced in the modern world. The rest of us are pursuing happiness, and here comes this fundamentalist anachronism, spreading death.

PARIS - Shootings and explosions erupted in the Paris area on Friday night, and French news services said at least 39 people were dead, dozens wounded and others taken hostage in what appeared to be coordinated militant attacks.

And it's not like the First World is the best world in every way. It has pockets of deep urban and rural poverty, says Paul Farmer, co-founder of the nonprofit Partners in Health and a professor at Harvard Medical School. "That's the Fourth World," Farmer says, referring to parts of the United States and other wealthy nations where health problems loom large.

BEIJING - Coastal wetlands in China have vanished at an alarming rate because of the country's economic development, and current economic plans could diminish them to below the minimum needed for "ecological security," including fresh water, fishery products and flood control, according to a report released on Monday by Chinese scientists and an American research center.

- China's consumption boom is not enough to succour the world economy. - Today, rising from the once-modest streets is a gaudy building intended for a new kind of model citizen: consumers.

VIENNA - At the migration center in the east wing of the main train station here, Ragad al-Rachid, a petite 19-year-old psychology student and a Syrian Muslim, is immersed in the logistical details of helping dozens of people a day adjust to new lives in her adopted country.

PARIS - France will join the coalition of Western and Middle Eastern countries carrying out airstrikes against the Islamic State in Syria, the country's defense minister said on Wednesday, with the first strikes likely to come in the next couple of weeks.

Thought I'd share a rundown of this week's global events. This article gives enough detail for you to be in the know and continue research on certain topics if you're interested but not so much detail that you're reading for hours!