NATO, Russia and Sabotage

German intelligence chief says Russia’s hybrid war could prompt NATO allies to invoke the mutual defence Article 5.
Russia's acts of sabotage against Western targets could prompt NATO to invoke its Article 5 mutual defence clause, Germany's ...
Article 5 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 ...
Germany's foreign intelligence chief warns that Russia's sabotage actions may lead NATO to invoke Article 5, mandating mutual ...