Donald Trump says he will withdraw the US from the nuclear agreement with Iran.
Western leaders continue to discuss possible military action in Syria after a chemical attack killed dozens of people in the formerly rebel-held town of Douma last week.
The Canadian data firm that helped Vote Leave win the 2016 Brexit vote has been suspended by Facebook over reports it handled personal data allegedly looted from the social network by Cambridge Analytica.
Leading Brexiteer Liam Fox has called on the EU for help in combating the steep tariffs imposed on UK exports of steel and aluminium to the US by Donald Trump.
Donald Trump has pulled out of a scheduled visit to the UK in February over fears that he would be met be widespread protests and derision.