Members will plan how to come to each other’s aid in the event of an attack as Nato faces worst crisis in its history

Worries about Donald Trump's criticism of NATO amid the Iran war, along with his earlier threats to seize Greenland, have prompted the bloc to act.

The US president has cast doubt on the US commmitment to NATO over members' response to the war in Iran.

Members will plan how to come to each other’s aid in the event of an attack as Nato faces worst crisis in its history

Brussels officials will draw up a plan on how to use the EU’s little-known mutual assistance pact in the event of a foreign attack