US President Joe Biden meets with NATO Secretary General Jens Stoltenberg before the start of the NATO heads of state summit in Brussels and says he wants "all of Europe to know that the United States is there," with respect to Article 5 of the North Atlantic Treaty. Article 5 provides that if a NATO Ally is the victim of an armed attack, each and every other member of the Alliance will consider this act of violence as an armed attack against all members and will take the actions it deems necessary to assist the Ally attacked.