NATO secretary general pledges to help partners fight so-called Islamic State

NATO leaders finished the Warsaw summit this weekend by approving an aid package for Ukraine and saying that they do not recognise Russia's illegal annexation of Crimea in 2014.

It followed a landmark decision taken on Friday, the first day of the summit, to deploy four multinational, rotating troops to Poland and three other Baltic states which fear Russian aggression.

The summit, which was the largest so far, brought 21 prime ministers and 18 presidents to Poland, including Barack Obama.

On Friday, the first day of the summit, Secretary General Jens Stoltenberg announced that NATO would help its partners fight against the so-called Islamic State.

He also said it would provide surveillance aircraft to help tackle terrorism, and that NATO would launch a new security operation named Sea Guardian in the Mediterranean.

Additionally, NATO country leaders agreed to extend the Resolution Support mission in Afghanistan, providing financial support for Afghan armed forces and police until 2020 - but under the condition that it implements reforms.