The president also asked all Americans to wear face coverings, saying they show "patriotism".

The social media site says it is taking action to limit behaviour that could lead to "offline harm".

Matiullah Jan, a prominent journalist, was missing for hours, but is now back home.

Major carriers in the US and Europe want a coordinated programme to get passengers flying again.

A group including Serena Williams is to fund a new Los Angeles-based women's team set to launch in time for the National Women's Soccer League in spring 2022.

Investigators visit sites in Germany, Italy and Switzerland, and two UK firms are asked to provide documents.

Yury Dmitriyev says the case was politically motivated in reaction to his work as a Stalin scholar.

Homeland Security Secretary Chad Wolf says officers will not leave the city until violence stops.