NATO leaders agreed to draw up action plans on how to achieve the members’ defense spending targets.The leaders of the 28 member nations met in Brussels on Thursday. US President Donald Trump attended the summit for the first time. The prime minister of Montenegro was also invited. The country will join the alliance next month.

Trump asked the NATO members to abide by their pledge to spend at least two percent of their GDP on defense.The leaders agreed to draft national plans for achieving this goal, and to submit progress reports every year.

They also agreed that NATO will become an official member of the US-led coalition against the Islamic State militant group.

NATO Secretary General Jens Stoltenberg said the decisions taken on Thursday will make the alliance stronger and safer as it continues to adapt to new challenges.