U.S. President Donald Trump indicated on Wednesday he will consider providing more of the Patriot missiles that Ukraine needs to defend against mounting Russian strikes, adding that Russian President Vladimir Putin "really has to end that war".

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.