US president Barack Obama’s administration sent a nuclear agreement with Tehran to congress yesterday.

Outgoing US defence secretary Chuck Hagel has said he is worried about a potential division within Nato as countries in the north want to focus on the growing threat from Russia, while other alliance members in the south are more worried about the influx of foreign fighters from northern Africa.

Hagel leaves after rocky tenure and crisis prompted by rise of Isis

North Korea’s sabre-ratting against the US has actually left its strongest ally, China, feeling that it is being encircled, writes Paul Eckert.