In his ongoing frustration with the war against Iran, U.S. President Donald Trump continues to lash out at America’s European allies. He called NATO a "paper tiger,” and questioned the other members’ willingness to go to war alongside the U.S. He calls it a failed "test” that America is "going to remember.”

Is he right to criticize the Europeans and Canada? Are they likely to enter the fray? And if they choose to participate, what could they actually do in terms of supporting the U.S. and Israel as hostilities enter a second month?

Let me start with the canard that NATO has not historically stepped up for the U.S. Here are the facts: We were attacked on Sept. 11, 2001. I was then a rear admiral, serving in an office on the outer ring of the Pentagon on the side that was hit by the terrorist-controlled aircraft. I was nearly killed.

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