NATO Secretary General Mark Rutte made a plea to Europe as the threat of Russian invasion into NATO territory ramps up.

NATO members need to increase their air and missile defenses by 400% to counter the threat from Russia, the head of the military alliance said Monday, warning that Moscow could be ready to attack it within five years.

Washington’s European allies must make a “quantum leap” in military spending to deter Russia, the head of NATO is expected to say Monday, calling for a 400% increase in the continent’s air and missile defense budget.