BBC News hears from users, dealers, prison and recovery workers as the country battles with a deadly new drug epidemic.
The US president blocked numerous sanctions on Russia two days before they were due to take effect.
A new wave of synthetic drugs is sweeping across the United States, raising fear of a worsening drug crisis. The BBC's Quentin Sommerville reports from the frontlines in South Side, Chicago, where communities are battling the crisis.
Presley Gerber's death in September is being investigated as a suspected overdose.
At least four people are confirmed to have died after a huge fire swept through the base.
French President Emmanuel Macron made a national television address after rioting caused widespread damage.
An expedition to a remote Pacific island hoping to uncover the American aviator's wreckage was on hold for three days.
At least one person was killed in the strikes, which also hit a data centre used by Russia's equivalent of Facebook.
Around 1,800 people were arrested after nationwide protests saw outbreaks of violence and vandalism.