President Donald Trump went to the NATO Summit in the Netherlands. He met with King Willem-Alexander, prompting questions about the leaders' heights.

The President rode in on a wave of momentum, but events during his trip revealed the risks of his disruptive approach:

The leaders reaffirmed their “ironclad commitment” to NATO’s collective defense clause, Article 5. In recent years, Trump had sowed seeds of doubt about whether the U.S. — NATO’s most powerful member — would come to the aid of any ally under attack.