Again, the key word here is armed - espionage related activities, even if they cause physical damage, don't generally count. There is some wiggle room, but the

Again, the key word here is armed - espionage related activities, even if they cause physical damage, don't generally count. There is some wiggle room, but the only attack that has led to an invocation of Article 5 to date has been the 9/11 terrorist attacks.