Has a cyberattack constituted an act of war? Probably not yet

Fifth Domain: Following the Sept. 11 terrorist attacks in 2001, the United States became the first nation in NATO history to invoke Article 5, the organization’s premise that an attack on one country is an attack on all of its member countries.

The rarity of this act is why some officials raised eyebrows when NATO made it clear last year that a large-scale cyberattack against a member nation could now trigger the same response.

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