Fact Check: Article 5 of NATO states that an attack on one member is an attack on all.

Claim: Article 5 of NATO states that an attack on one member is an attack on all.

Verdict: Correct (75% confidence)

Explanation: According to the NATO official website (nato.int), Article 5 of the North Atlantic Treaty states that an armed attack against one NATO member shall be considered an attack against them all. This is further supported by the Brennan Center (brennancenter.org), which explains that Article 5 commits member states to collective defense, treating an armed attack against one Ally as an attack against all. The Bush Center (bushcenter.org) also confirms that Article 5 is NATO's collective defense agreeme...