Article 5 is the cornerstone of the alliance’s collective defense: It states that an attack on one member will be treated as an attack on all.
“In my view, this is a really big step forward. And, as I said, the American side has also…

Article 5 is the cornerstone of the alliance’s collective defense: It states that an attack on one member will be treated as an attack on all.
“In my view, this is a really big step forward. And, as I said, the American side has also…