Steadfast Defender 21 aims to simulate response to an attack on any one of military organization's members and will test ability to deploy troops from US and keep supply lines open

Pompeo says 'death of the transatlantic alliance is grossly over-exaggerated,' but Macron argues there's a 'weakening of the West' as the US reassesses its relationship

Secretary General Jens Stoltenberg says alliance need not mobilize large deployments of combat troops but should 'enable local forces to fight terrorism themselves'

Britain's Johnson says Iranians should not repeat 'reckless and dangerous' action, France declares de-escalation is a priority, EU warns further violence is 'in no one's interest'

London and Madrid join other major powers in punishing Ankara for its invasion of Kurdish-held area

EU chief says political solution is only way to end the Syrian conflict; NATO calls for Turkey to avoid actions that may further destabilize the region

But alliance chief also places blame for demise of INF treaty on Moscow, expresses support for Washington

At meeting of military alliance, Jens Stoltenberg says Moscow 'still has an opportunity to save the INF treaty,' but if not 'we need to respond'