NATO Secretary General Mark Rutte on Thursday delivered dire warnings about Russian President Vladimir Putin and the growing threat of war that Europe faces from the Kremlin.

Why it matters: Rutte warned that Putin won't stop his aggression with Ukraine and could look to attack NATO countries within five years. • "Conflict is at our door," Rutte said. "Russia has brought war back to Europe, and we must be prepared for the scale of war our grandparents or great-grandparents endured." • The White House and Russian Embassy did not immediately respond to Axios' request for comment Thursday.

Threat level: Rutte said NATO has increased vigilance and strengthened deference along its eastern flank border with Russia. • In less than a week this year, Russia launched drone incursions on both

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