Article5 has been invoked only once (in response to the 9/11 attacks), and it has not been invoked in response to major terrorist attacks against other NATO members in the years that ...
Trump also unnerved some NATO members by questioning the collective-defense provision at the core of the alliance. Article5 has been invoked only once in NATO's 74-year history: after the ...
Nato members promise to pay 2% of their ... by another ethnic or religious group in that same area. The Article5 defence was invoked after the 9/11 attacks in the US in 2001.