European leaders did not have high expectations for their meeting with President Trump.
"Many of these countries owe massive amounts of money from past years", he said, adding that the target they had committed to - two per cent of each country's GDP to be spent on defence - was merely "the bare minimum".
Only five countries - Estonia, Greece, Poland, the United States and the United Kingdom - now meet the standard.
They spoke after Trump declined to pledge allegiance to Article 5 of the Nato treaty on mutual defence and complained that most allies were not spending enough. Mr. Trump has said the U.S.is reconsidering its participation in the Paris climate agreement.
Donald Trump's first foreign visit as the President of the United States has been a memorable one.
Various U.S. media outlets reported the name of the suicide bomber, attributing the information to American officials, before it was released by British officials. "This is why we will indeed make our contribution to security", she said.
Elvis and red velvet boost value of jet up for auction
According to the listing on liveauctionneer.com, every detail inside the plane was hand-selected by Elvis. While the "lost jet" will sell for millions, residents say they have ideas of their own.
In a statement issued by the White House, Trump said the "alleged leaks coming out of government agencies are deeply troubling". US Secretary for Homeland Security John Kelly argued that a visa-waiver program should be revised, saying that European Union citizens who have travelled to Syria and Iraq and become radicalized pose a security threat to the United States.
Mr Trump's sharp words may have won him few friends among the gathered leaders, who appeared to avoid Mr Trump at the end of the "family photo", the group photograph customary at these global summits.
British officials are particularly angry that photos detailing evidence about the bomb were published in The New York Times, although it was unclear whether the paper obtained the photos from US officials.
Trump and his aides have long complained about "leakers" they think are trying to undermine his presidency. -European relations since Trump took office.
Mr Trump recovered quickly from the awkward "shove", adjusting his jacket before interrupting the conversing world leaders, speaking to Lithuanian President Dalia Grybauskaite.
U.S. President Donald Trump met his match in a handshake showdown with France's new president, Emmanuel Macron. Both men's jaws seemed to clench.
The defense alliance is expected to give the US president at least one big thing he wants, a commitment to the coalition to fight Islamic State. An anti-terror coordinator may also be named.