NATO invokes Article 5

NATO has formally invoked its mutual defence clause after receiving "clear and compelling" evidence from the United States that Osama Bin Laden's Al-Qaida terrorist network was behind the 11 September attacks in the US. This is the first time in NATO's history that the alliance reaffirms its founding principle that an attack upon one is an attack upon all.

NATO has formally invoked its mutual defence clause after receiving „clear and compelling“ evidence from the United States that Osama Bin Laden’s Al-Qaida terrorist network was behind the 11 September attacks in the US. This is the first time in NATO’s history that the alliance reaffirms its founding principle that an attack upon one is an attack upon all.